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
I-26 EPSON S1C62740 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Input Ports)
Input Ports (K00–K03, K10)4.4
Configuration of
input ports
The S1C62740 has five bits general-purpose input ports. Each of
the input port terminals (K00–K03, K10) provides internal pull up
resistor. Pull up resistor can be selected for each bit with the mask
option.
Figure 4.4.1 shows the configuration of input port.
Fig. 4.4.1
Configuration of input port
Selection of "With pull up resistor" with the mask option suits
input from the push switch, key matrix, and so forth. When "Gate
direct" is selected, the port can be used for slide switch input and
interfacing with other LSIs.
Further, the input port terminal K10 is used as the input terminal
for the programmable timer/event counter and the interrupt port
for the SLEEP mode cancellation. (See Section 4.10, "Programma-
ble Timer", and Section 4.15, "Interrupt and HALT/SLEEP" for
details.)
Kxx
Mask
option
Address
V
DD
Interrupt
request
Data bus
V
SS