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 HARDWARE EPSON I-97
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (A/D Converter)
Control the middle electric potential generation circuit as shown in
Table 4.12.5.
GNDON0, GNDON1:
GND generation circuit control
(F0H•D3, D2)
GNDON1 GNDON0 Middle electric potential generation circuit
0 0 OFF (external impression)
0 1 ON (V
DD side load driving capacity – small)
1 0 ON (V
DD side load driving capacity – medium)
1 1 ON (V
DD side load driving capacity – large)
Table 4.12.5
Control of the middle electric
potential generation circuit
When the externally impressing the GND level, set it to OFF and
when using a built-in middle electric potential generation circuit
set it according to the load connected to the V
DD side.
When not using an A/D converter, set the circuit to OFF to reduce
current consumption.
At initial reset, these registers are set to "0".
VRON:
Reference voltage generation
circuit control
(F0H•D0)
Controls the reference voltage generation circuit.
When "1" is written: ON
When "0" is written: OFF
Reading: Valid
The built-in reference voltage generation circuit goes ON when "1"
is written into the VRON and goes OFF when "0" is written into it.
When the circuit goes ON, it generate V
R1 for resistance measure-
ment and V
R2 for voltage measurement.
When the externally impressing the reference voltage V
R1, set it to
OFF.
Also, when an A/D converter is not used, you should set the circuit
to OFF so as to reduce current consumption.
At initial reset, this register is set to "0".
VRAON:
Reference voltage internal
adjustment control
(F0H•D1)
Turns the internal adjustment of the reference voltage ON and
OFF.
When "1" is written: ON
When "0" is written: OFF
Reading: Valid
Internal adjustment of the reference voltage is done by writing "1"
into the VRAON. When no external adjustment is done using a
built-in reference voltage generation circuit, you should turn the
internal adjustment ON.
When doing the adjustment from the outside, turn the internal
adjustment OFF.
At initial reset, this register is set to "0".