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-94 EPSON S1C62740 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (A/D Converter)
Take care that conversion data may sometime become invalid by
turning the A/D converter OFF (including resetting). In this case,
as it is "0" the IDR is not set. When reading data after turning the
A/D converter OFF, the A/D converter should be OFF in the period
from an interrupt generation to the beginning of a reverse integra-
tion.
You should process the read data using software, such that is
becomes the object volume.
The voltage value (voltage measurement and differential voltage
measurement) and resistance value (resistance measurement) for
each count of read data becomes as follows according to the
resolution.
Resolution Voltage value for each count Resistance value for each count
6,552 50 µV (163.8 mV/3,276) Rref / 3,276
3,276 100 µV (163.8 mV/1,638) Rref / 1,638
1,638 200 µV (163.8 mV/819) Rref / 819
820 400 µV (163.8 mV/410) Rref / 410
Correction is necessary when inputting voltage through the
attenuator circuit. When A/D conversion is done by connecting a
sensor or the like, it will have individual sensor characteristics
between the sensor detection volume and the voltage or the resist-
ance, so you should use software to do the conversion according to
those characteristics.
Figure 4.12.17 shows a flow chart of the data conversion and data
reading and Figure 4.12.18 shows a timing chart for the A/D
conversion.