Specifications

Table Of Contents
I-98 EPSON S1C62740 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (A/D Converter)
ADRS0, ADRS1:
Resolution selection
(F3HD0, D1)
Selects the A/D conversion resolution (number of counts).
ADRS1 ADRS0 Resolution Conversion time
0 0 6,552 counts 500 msec
0 1 3,276 counts 250 msec
1 0 1,638 counts 125 msec
1 1 820 counts 62.5 msec
At initial reset, these registers are set to "0".
AIS0AIS3, AI0AI4:
Measurement items selection,
Analog input terminal selection
(F4HD0D3), (F5H, F6HD0)
Selects the measurement item and terminal that does the analog
input, by a combination of these registers.
Table 4.12.7 Specification of the analog input terminal and measurement items
AIS3 AIS2 AIS1 AIS0 AI4 AI3 AI2 AI1 AI0 Measurement items
000000001AI0 voltage measurement (GND reference)
000000010AI1 voltage measurement (GND reference)
000000100AI2 voltage measurement (GND reference)
000001000AI3 voltage measurement (GND reference)
000010000AI4 voltage measurement (GND reference)
000100011AI1 differential voltage measurement (AI0 reference)
001001100AI3 differential voltage measurement (AI2 reference)
010010100AI2 resistance measurement (AI4 reference)
100011000AI3 resistance measurement (AI4 reference)
One combination can be selected from within Table 4.12.7. Do not
set a value other than those indicated in Table 4.12.7.
At initial reset, these registers are set to "0".
ADON:
A/D converter control
(F6HD3)
Turns the A/D converter ON/OFF and resets it.
When "1" is written: ON and reset
When "0" is written: OFF
Reading: Valid
When the A/D converter is in the stop status, the A/D converter
goes ON and starts A/D conversion by writing "1" into the ADON.
When it writes "1" into the ADON during the A/D conversion
operation, it then stops the A/D conversion cycle and shifts to a
new A/D conversion (from auto zero adjustment) cycle.
It terminates the A/D conversion at the point where it writes "0"
into the ADON and turns the A/D converter circuit OFF.
You should set the A/D converter to OFF when it is not necessary,
in order to reduce current consumption.
At initial reset, this register is set to "0".
Table 4.12.6
Resolution selection