Many scans of www.eio.com's discussion groups finally turned up trumps after three years.
The controller is controlled by a standard Z80 style 8 bit bus, and needs a 1Mhz clock, so it is not a very useful display to use with a a PIC16F84, needing some 10 control lines.
Any information in this web page is indicative only. You are expected to establish if it is accurate.
I have only spent a few evenings soldering up the demo board, modifying my PIC16F628 Serial Monitor Program, and writting this web page.
My old web page with other LCD information
It needs to clocked at about 1Mhz, which is connected to ENB.
Here is the circuit of my demo breadboard:
The connections from the PIC16F628 are:
PortA: A0 - See PIC16F628 Serial Monitor Program A1 N/C A2 LCD module /WR Pin 11 A3 LCD module A0 Pin 10 PortB: B0 - B7 connect to D0 to D7 LCD Module: - LCD module A0 Pin 10 connect to 47nF capacitor connected to ground. Module has 500K pull up resitor. ENB PIC16F628 Clock Out. PIN Function / comment 1 Vdd 2 D0 3 D1 4 D2 5 D3 6 D4 7 D5 8 D6 9 D7 10 A0 Address 0 11 /WR 12 /RD 13 ENB connect 500kHz to 2MHz clock - 14 /CS connect to GND 15 /RESET connect a 47nF capacitor to ground. 16 /Vout connect via 20K VR to GND to adjust contrast 17 Vss 18 not connected
;-------------------------------------------------------------------------- ; Sec 5.12 Routines to Control the Epson SED1300 LCD controller ;-------------------------------------------------------------------------- LCwrtData MOVWF LCbuff BANKSEL TRISA MOVLW 0x1 MOVWF TRISA CLRF TRISB BANKSEL PORTA MOVLW 0x0C MOVWF PORTA GOTO LCwrt LCwrtCmd MOVWF LCbuff BANKSEL TRISA MOVLW 0x1 MOVWF TRISA CLRF TRISB BANKSEL PORTA MOVLW 0x04 MOVWF PORTA LCwrt MOVFW LCbuff MOVWF PORTB GOTO $+1 BCF PORTA,2 GOTO $+1 GOTO $+1 BSF PORTA,2 CALL LCdelay RETURN LCdelay MOVLW 0xFF LCdelayBit0 MOVWF LCdelayCnt LCdelayBit1 GOTO $+1 DECFSZ LCdelayCnt ; 1 GOTO LCdelayBit1 ; 2 clk CLRWDT RETURN LCinit MOVLW SED1300systemReset CALL LCwrtCmd CALL LCdelay CALL LCdelay MOVLW SED1300systemReset CALL LCwrtCmd CALL LCdelay CALL LCdelay MOVLW SED1300displayOn CALL LCwrtCmd MOVLW SED1300clearDisplayData CALL LCwrtCmd CALL LCdelay CALL LCdelay MOVLW SED1300displayOn CALL LCwrtCmd MOVLW 'S' CALL LCwrtData MOVLW 'E' CALL LCwrtData MOVLW 'D' CALL LCwrtData MOVLW ' ' CALL LCwrtData MOVLW '1' CALL LCwrtData MOVLW '3' CALL LCwrtData MOVLW '0' CALL LCwrtData MOVLW '0' CALL LCwrtData MOVLW ' ' CALL LCwrtData MOVLW ':' CALL LCwrtData RETURNHere is the code used in my Serial Monitor Program. See PIC16F628 Serial Monitor Program
I modified my serial Monitor program PIC 16F628 Code SR002.ASM and added extra commands;
Code serial Monitor program PIC 16F628 Code SR002_SED1300.ASM for SED1300 display.
; Serial Commands:- ; ; There are two modes:- Command mode and literal mode. ; ; On power up, after displaying SED 1300 : the display is in literal mode, displays charters straight to display. ; ; A <ESC> toggles between Literal and Command mode ; ; In literal mode the characters sent are put on the display. ; A <CR> clears the display and resets the cursor. ; ; The only Control character interpreted is <CR>. ; ; In Command Mode the following commands are recognised. ; ; (Do not use spaces, <BS> and <DEL> or cursor keys) ; ; SED1300 LCD controller commands ; <CR>dDD; write DD to SED1300 controller as data ; <CR>cDD; write DD to SED1300 controller as command ; <CR>i; init chip and display SED1300 : ; <ESC> Toggles back to literal mode ; ; File Regiters ; <CR>wAADD; write DD to register AA ; <CR>rAA; read AA and output to serial port ; ; ; EEPROM ; <CR>pAADD; write DD to EEPROM register AA ; <CR>gAA; read EEPROM register AA and output to serial port ; ; PRIPHERALS ; <CR>f; init PWM ; ; sets up PWM module ; W92FF; - PR2 - set PWM period max ; W1532; - CCPR1L - Duty Cycle / ON period ; W8600; - TRISB - All Outputs ; W1204; - T2CON - Set up Tmr 2 ; W173C; - CCP1CON - Set up as PWM module. ; W9265; - PR2 - set PWM period for 10Khz if 4Mhz crystal. ; ; ; SERIAL PORT CONTROL: ; ; PORT A0 is Serial input ; PORT A0 is serial output ; ; usb gmus-03 USB Serial Adapter ; ; TX D9 Pin 3 -[4k7]----+-----PA0 ; RX D9 Pin 2 ----------/ ; ; GND D9 Pin 5 ---------------- 0VBuild this code with Microchip's MPLAB.
;-------------------------------------------------------------------------- ; Sec 5.12 Epson SED1300 command constants ;-------------------------------------------------------------------------- SED1300systemReset EQU 0x10 SED1300clearDisplayData EQU 0x01 SED1300cursorAtHome EQU 0x02 SED1300cursorReturn EQU 0x03 SED1300setCursoDirectionInc EQU 0x04 SED1300setCursoDirectionDec EQU 0x05 SED1300cursorInc EQU 0x06 ; one char, does not affect ram SED1300cursorDec EQU 0x07 SED1300setCursorFont_ EQU 0x08 SED1300setCursorFont5x7 EQU 0x09 SED1300_cursorBlinkOff EQU 0x0A SED1300_cursorBlinkOn EQU 0x0B SED1300cursorOff EQU 0x0E SED1300cursorOn EQU 0x0F SED1300displayOff EQU 0x0C SED1300displayOn EQU 0x0D SED1300displaySuppressOff EQU 0x20 SED1300displaySuppressOn EQU 0x60 ; only works while cursor is on SED1300setCursorAddress EQU 0x80 ; + position 0..0x17
