Specifications
Table Of Contents
- Technical Hardware
- 1 OVERVIEW
- 2 POWER SUPPLY AND INITIAL RESET
- 3 CPU, ROM, RAM
- 4 PERIPHERAL CIRCUITS AND OPERATION
- 4.1 Memory Map
- 4.2 Resetting Watchdog Timer
- 4.3 Oscillation Circuit
- 4.4 Input Ports (K00–K03, K10)
- 4.5 Output Ports (R00–R03)
- 4.6 I/O Ports (P00–P03, P10–P13, P20–P23)
- 4.7 LCD Driver (COM0–COM3, SEG0–SEG31)
- 4.8 Clock Timer
- 4.9 Stopwatch Timer
- 4.10 Programmable Timer
- 4.11 Serial Interface (SIN, SOUT, SCLK, SRDY)
- 4.12 A/D Converter
- 4.13 General-purpose Operation Amplifier (AMP)
- 4.14 SVD (Supply Voltage Detection) Circuit
- 4.15 Interrupt and HALT/SLEEP
- 5 SUMMARY OF NOTES
- 6 DIAGRAM OF BASIC EXTERNAL CONNECTIONS
- 7 CHARACTERISTICS
- 8 PACKAGE
- 9 PAD LAYOUT
- Technical Software
- 1 INTRODUCTION
- 2 BLOCK DIAGRAM
- 3 PROGRAM MEMORY (ROM)
- 4 DATA MEMORY
- 5 INITIAL RESET
- 6 PERIPHERAL CIRCUITS
- 6.1 Watchdog Timer
- 6.2 OSC3
- 6.3 Input Ports (K00–K03 and K10)
- 6.4 Output Ports (R00–R03)
- 6.5 I/O Ports (P00–P03, P10–P13 and P20–P23)
- 6.6 LCD Driver
- 6.7 Clock Timer
- 6.8 Stopwatch Timer
- 6.9 Programmable Timer
- 6.10 Serial Interface Circuit
- 6.11 Amplifier
- 6.12 SVD (Supply Voltage Detection) Circuit
- 6.13 A/D Converter
- 6.14 Sleep
- 6.15 Interrupt
- 7 SUMMARY OF NOTES
- APPENDIX
S1C62740 TECHNICAL SOFTWARE EPSON II-33
CHAPTER 6: PERIPHERAL CIRCUITS (LCD Driver)
• LCD display ON/OFF is controlled by register LCDON
(EFH•D0).
Set LCDON to "1" to turn on LCD.
Set LCDON to "0" to turn off LCD.
Figure 6.6.2 is an example of the 7-segment LCD assignment.
g f e
91H
dcba
90H
D3 D2 D1 D0
Address
Register
a
g
fb
ec
d
In the assignment shown in Figure 6.6.2, the 7-segment display
pattern is controlled by writing data to display memory addresses
90H and 91H.
Fig. 6.6.2
7-segment LCD assignment
Example program
for the LCD driver
LCD common control and display ON/OFF
Label Mnemonic/operand Comment
;*
;* LCD DRIVER
;*
;* TURN ON LCD AND USE 4 COMMONS
;
ZLCDC EQU 0EFH ;LCD CONTROL REGISTER
;
LD X,ZLCDC ;SET LCD CONTROL REGISTER ADDRESS
LD MX,0001B ;SET DUTY AS 1/4 (4 COMMONS)
;SET LCD DISPLAY ON
;