Description
1 Piece
Technical Condition: This item is brand new and stored with us still in its original packaging, wrapped in a manufacturer sealed anti static bag and packed in a sealed box of 10 pieces. If buying 1 piece you will receive your item still sealed in the anti static bag and properly packaged.
The photo’s show exactly what is included.
If not in the photo’s or description it is not included. If you have any questions please contact us before purchasing
- Please ensure that your original part number matches the above no. exactly, or check with the manufacturer for compatibility.
- This part is guaranteed to be fully functional, original and authentic.
Using the part no.. 996-0277-01 we found the following link to youtube which shows the display working :-
https://www.youtube.com/watch?v=Z-SmJC5tCYc
Sun Part no. 370-2311-02 rev 50 Touch Screen LCD Panel
Planar part no. EL160.80.38-SM1 EL
Originally we could find very little information on these, all the following was supplied to us from satisfied customers:-
Introduction
This display is a 160×80 pixel monochrome (amber and black) display with a 6×3-pad matrix touch screen and three LEDs (two green, one amber). It includes an Epson SED1335 controller, and an ASIC which controls the touch screen and appears to perform some signal conversion work on the SED1335 timing outputs.
It carries the following labels…
- PART # 996-0277-01
EL160.80.38-SM1
REV: E - SUN PART NUMBER
370-2311-02 REV: 50 - PLANAR AMERICA
MADE IN USA
and has an 8-bit 8080-style data bus with two address lines. The LEDs are controlled by three pins on the connector and require external 680-ohm pull-up resistors. Two power supplies are required: +5V DC for the logic, and +12V DC for the analog circuitry (high-voltage power supply).
Different versions of the display
There appear to be at least two different versions of this display floating around. One uses a Xilinx XC3000-series FPGA to drive the touch panel, the other uses an ASIC, apparently custom-made for Planar by AMI (now AMIS).
The key difference between the two controllers is in the way that interrupts are handled. When a touchscreen event is detected, the Xilinx chip will pulse /INT low for around 15 to 20 nanoseconds, whilst the AMI chip will hold /INT low until the touch screen register is read from or written to. See below (under “Touch screen”) for more information about this ‘quirk’.
Input connector
The data connector is a 32-pin Hirose FX2. The connector on the board is Hirose part number FX2-32P-1.2SV(71), and the mating connector is P/N FX2-32S-1.27SV(71). Pin one is the top-right pin, pin two is directly below that (on the bottom right), pin 31 is on the top left and pin 32 is on the bottom right.
Unfortunately the FX2 isn’t stocked by the likes of Farnell or Rapid, which makes it difficult to actually connect a cable to this display. It should be possible to find a connector with a similar footprint, though the sticking point is the distance between the bottom of the display PCB and the metal frame. The FX2 has a mated height of around 12mm.
The Samtec FTSH series pin header and FLE series socket may be suitable, although the mated height of these would only be 5mm or so (possibly less than that). An FTSH mated to a CLP would probably be even shorter. These would have to be cut to size (the 32-way size isn’t a standard Farnell stock item, nor is the 30-way; the 40-way headers and receptacles could be cut down quite easily).
The Tyco-AMP AMPMODU connectors are another possible alternative; these are similarly priced, but have the option of a higher mated height (9.91mm for the 5-104693-3 header/plug, plus the 2.46mm base height of the 5-104652-3 receptacle/socket, for a total of around 12.5mm). The catch is that, once again, these aren’t available in a 32-pin variant; the nearest size is 30 pins (which would work but the two ground pins would be left ‘floating’).
Additionally, there are two metal mounting tabs on the bottom of the AMPMODU connectors. Either holes would have to be drilled in the PCB (bad idea), or the tabs would have to be cut off. Removing the tabs would make the connector less rugged, though the metal frame would most likely provide plenty of support.
Pin configuration
| Pin | Name | Function |
|---|---|---|
| 1 | LEDG1_L | Cathode of bottom LED (green) |
| 2 | LEDY_L | Cathode of middle LED (amber) |
| 3 | SELFTEST | L=normal operation, H=self test |
| 4 | LEDG2_L | Cathode of top LED (green) |
| 5 | A1 | Address 1 (MSB) |
| 6 | GND | |
| 7 | GND | |
| 8 | A0 | Address 0 (LSB). SED1335 /CS. |
| 9 | /RESET | L=Controller reset |
| 10 | GND | |
| 11 | D7 | Data I/O 7 (MSB) |
| 12 | /WR | L=Write |
| 13 | D6 | Data I/O 6 |
| 14 | GND | |
| 15 | D5 | Data I/O 5 |
| 16 | /RD | L=Read |
| 17 | D4 | Data I/O 4 |
| 18 | GND | |
| 19 | D3 | Data I/O 3 |
| 20 | GND | |
| 21 | D2 | Data I/O 2 |
| 22 | n.c. | No connection |
| 23 | D1 | Data I/O 1 |
| 24 | GND | |
| 25 | D0 | Data I/O 0 (LSB) |
| 26 | /INT | Interrupt output (AMI only?) |
| 27 | VL | +5V (logic) |
| 28 | GND | |
| 29 | VH | +12V (analog) |
| 30 | VH | +12V (analog) |
| 31 | GND | |
| 32 | GND |
The data bus should be pulled up to +5V using a resistor pack. I used 1k resistors, although 4k7 or 10k resistors (or anything in the range 1k to 10k) should be just as suitable. If you don’t want to use the touchscreen, the data bus pull-ups may not be required.
Address map
| A1 | A0 | Assigned to |
|---|---|---|
| 0 | 0 | SED1335 |
| 0 | 1 | SED1335 |
| 1 | 0 | Touch screen (column address) |
| 1 | 1 | Touch screen (row address) |
Self test mode
If the SELFTEST pin is pulled low when the +5V and +12V supplies are connected, the display will function high. If it is pulled to +5V or left floating, however, the display will enter a self-test mode. Displays with the AMI ASIC will display an alternating all-pixels-on/all-pixels-off pattern, while boards with the Xilinx FPGA will display a pattern of vertical lines moving to the left.
The self-test is a good way to at least ensure that the power lines and grounds are wired up correctly, and that the display ASIC is at least partly functional (although I don’t think the self-test tests the SED1335 controller).
SED1335 Initialisation
The following parameters are required to initialise the SED1335:
27×10-character layout with 6×8 characters
Command 0x40: System Set
M0 = 0 (internal CG ROM)
M1 = 0 (no D6 correction)
M2 = 0 (8-pixel character height)
WS = 1 (dual panel drive)
IV = 1
FX = 5 (character width = 6)
FY = 7 (character height = 8)
C/R = 26 (27 columns of text)
TC/R = 34 (26 + 8)
L/F = 159 (80 rows, dual drive)
APH:APL = 32 (address increment)
20×10-character layout with 8×8 characters
This makes the math a little easier if you’re doing graphics — an entire byte is used for each block of 8 pixels (in 27×10 mode, a byte stores 6 pixels).
Command 0x40: System Set
M0 = 0 (internal CG ROM)
M1 = 0 (no D6 correction)
M2 = 0 (8-pixel character height)
WS = 1 (dual panel drive)
IV = 1
FX = 7 (character width = 8)
FY = 7 (character height = 8)
C/R = 19 (20 columns of text)
TC/R = 27 (19 + 8)
L/F = 159 (80 rows, dual drive)
APH:APL = 32 (address increment)
Touch screen
This display incorporates a 6-row, 3-column ‘pushbutton’ type touch screen. The ASIC (either the Xilinx or AMI chip depending on display version) continuously scans the touchscreen, and stores the address of the pad which was touched (if any) in two registers — ROW and COL.
The problem is that while the data is presented to the bus when /RD goes low, the touch screen registers (both of them!) are cleared on the low-to-high edge of /RD. To work around this, the procedure for reading the touch screen is:
- Set address pins to ’10’ (column address)
- Set data port to input mode
- /RD = 0 (start the read)
- Read the state of the data port — this is the Column Address
- Set address pins to ’11’ (row address) without changing the state of /RD
- Read the state of the data port — this is the Row Address
Now a little bit of extra processing has to be performed on the touch screen address in order to get an X/Y co-ordinate:
- AND the Column Address with 0x3F. This masks off the top two bits (which are always 1)
- AND the Row Address with 0x07. This masks off the top five bits.
- If Column == 0x3F or Row == 0x07, then the screen was not touched. Stop here.
- Column and row addresses are encoded as “one hot” bytes — bytes with one bit set. To get the column address (in C):
for (i=1; i<=8; i++) { if (column & 1) break; column >>= 1; } column = i; - Repeat the above code block for the row address (replace ‘column’ with ‘row’).
You should now have two variables — column and row — which contain the column and row address of the touch. If there was no touch, then your function will have exited and returned nothing (I usually return 0xFF for the column and row addresses).
Touch screen interrupts
As mentioned above, there are (at least) two variants of the EL160.80.38-SM1 ASIC:
- The AMI ASIC. Built by AMI for Planar, fully custom.
- The Xilinx FPGA. A field-programmable gate array, with logic designed by Planar.
The key difference between the two is in how touch screen interrupts are handled. When a touch screen event is detected, the AMI ASIC will pull the /INT pin low and hold it low until the touch screen event registers (either column, row or both) are read. In contrast, the Xilinx FPGA will pulse /INT low for around 15 to 20 nanoseconds, then wait for the registers to be read before allowing another interrupt to be issued.
Both controllers appear to act upon the state of the /RESET line; that is, if /RESET is lowered, the interrupt flag is cleared and the touch screen controller reverts to a state of “no touch events detected”.
The following scope traces (from my Tek TDS2024B) show the general form of the interrupt pulse:
I suspect the 30cm length of ribbon cable and lack of decoupling is having an effect on this pulse (and the inverse-sinc shaped noise on the /INT line which was causing the Tek to mis-trigger)…
Example source code
- PlanarEL160-80.zip — C source code (MPLAB C18) for a test application using a Microchip PIC18F252.
References
- http://forum.lcdinfo.com/viewtopic.php?t=1051&start=15 — last post in this forum thread contains the pinout for the display. Lots of pictures!
- http://www.recycledgoods.com/zoom.aspx?productID=25467 — photos of the module, assembled
- breconjess (eBay) — Currently (18-Jul-2010) selling these displays on eBay at a very reasonable price. Search the store for “Sun LCD display module”.
Feedback from one customer:
The display is just what is says on the tin – Made (extremely well) by Planar in the USA for SUN computer systems – it is most likely a custom electro-luminescent display – ELD – I have taken it apart but no more clues inside other than it is based on Epson SED1335 LCD driver but the display looks like ELD – made during or after year 2000
Further comments from another customer:
The display is a 160×80 pixel thin-film electroluminescent display made by Planar. A 6×3 matrix touch-screen has been mounted onto the front of the panel. The onboard controller is an Epson SED1335, with an ASIC to provide touchscreen and additional panel drive signals. Three LEDs are mounted on the right side of the panel; these can be switched on by pulling the respective LED pin to ground with a 1k resistor.
The connector is a Hirose FX2. The connector on the board appears to be Hirose part number FX2-32P-1.2SV(71). This means the mating connector is Hirose part number FX2-32S-1.27SV(71). Both of these are available from Digi-Key and Mouser, though are rather expensive (£4 per plug or socket). A cheaper alternative is to desolder the existing connector and solder a piece of 0.5in-pitch ribbon cable to the PCB pads.
DO NOT solder down to the pads without removing the existing connector. This is how I broke my first display — one of the ground leads came loose, hit a transistor on the back of the board, and blew out the driver circuit. Also, there are high voltages on the back of the PCB (250V or so) — so it’s not a good idea to run the display outside of the metal casing.
Looking at the socket on the display panel, with the part number labels on the left, pin 1 is on the top right, pin 2 is directly below that (bottom right), pin 31 is on the top left, and pin 32 is on the bottom left. All the pins on the top row are odd-numbered, the ones on the bottom row are even-numbered.
The pinout is as follows (as posted in the LCD Info forum by “one~zero”: <http://forum.lcdinfo.com/viewtopic.php?t=1051&start=15>): _____________31 / 132 ___________/ 2
1 LEDG1_L Cathode of top LED (green)2 LEDY_L Cathode of middle LED (amber)3 SELFTEST L=normal operation, H=self test(test = alternating all pixels on / all pixels off)4 LEDG2_L Cathode of bottom LED (green)5 A1 Address 16 GND7 GND8 A0 Address 09 /RESET L=Controller reset10 GND11 D712 /WR L=Write13 D614 GND15 D516 /RD L=Read17 D418 GND19 D320 GND21 D222 n.c.23 D124 GND25 D026 /INT Touchscreen Interrupt output27 VL +5V28 GND29 VH +12V30 VH +12V31 GND32 GND
(I may have mixed up the pins for the two green LEDs…)
Connect all the GND pins to ground, all the VH pins to +12V, and VL to +5V. If you want to run the self-test, connect SELFTEST to +5V, otherwise connect it to ground. The self test will display a solid amber screen on the EL panel for about 3 seconds, then clear to black, then repeat.
The display has two address lines, eight data lines, and the following bus control lines: /RESET /RD /WR /INT SELFTEST
/RESET should be helf low for around 10ms when the display is powered on. Once /RESET is brought high again, a 10ms delay is necessary before the controller is ready to accept commands.
To write to the display, place the address and data on the respective buses, then pull /WR low for 200 or more nanoseconds.
To read from the display, place the address on the address bus, then pull /RD low, wait 200ns, read the byte on the data bus, and bring /RD high again.
Power required is +12V DC for the analog circuitry (high-voltage power supply) and +5V for the display controller logic. All interfacing is done using 5V LS/TTL logic levels.
To initialise the display: Prefix 0x — hexadecimal Prefix 0b — binary No prefix — decimal
A1 A0 Data 0 1 0b01000000 (Command 0x40 — System Set) 0 0 0b00111000 (internal CGROM, no D6 corr, 8px char height, dual panel drive, IV=1) 0 0 0b10000111 (8px horiz char size, two frame AC drive) 0 0 0b00000111 (8px vert char size) 0 0 19 (Total visible bytes per row, minus one) 0 0 27 (Total bytes per row including blanking) 0 0 159 (Total lines per frame, times two, minus one) 0 0 20 (Number of bytes per display line [low byte]) 0 0 0 (Number of bytes per display line [high byte])
0 1 0b01000100 (Command 0x44 — Scroll) 0 0 0x00 (Segment 1 Scroll Start Address = 0x0000) 0 0 0x00 0 0 159 (Segment 1 number of lines per scroll block) 0 0 0x00 (Segment 2 Scroll Start Address = 0x1000) 0 0 0x10 0 0 159 (Segment 2 number of lines per scroll block) 0 0 0x00 (Segment 3 Scroll Start Address = 0x0400) 0 0 0x04 0 0 0x00 (Segment 4 Scroll Start Address = 0x3000) 0 0 0x30
These values should be used to replace those in the first two steps of the Initialisation Procedure in the SED1335 Technical Manual (Table 27).
Touchscreen===========The touchscreen layout is as follows: 0 1 2 3 4 5A [ ] [ ] [ ] [ ] [ ] [ ] () LED_G1B [ ] [ ] [ ] [ ] [ ] [ ] () LED_YC [ ] [ ] [ ] [ ] [ ] [ ] () LED_G2
When the touchscreen is touched, the INT line will go low and stay low. To reset the interrupt, read the value from port 0b10 or 0b11. The lowest six bits of this value (AND 0x3F) depend on the horizontal column of the screen which was pushed: Row Value 0 1 (0x01) 1 2 (0x02) 2 4 (0x04) 3 8 (0x08) 4 16 (0x10) 5 32 (0x20)
I have not yet found a way to determine which row of the touchscreen was touched; repeatedly reading Registers 0b10 and 0b11 has no effect other than occasionally setting bit 6 (0x40) of the returned byte… Similarly, writing to the touchscreen registers has no effect other than clearing the interrupt flag.
I also have some PIC18F252 code which can turn the display on and make it display text (10 rows of 20 columns). “
