Toshiba H1 SERIES TLCS-900 User Manual
Page 203
TMP92CM22
2007-02-16
92CM22-201
AD Mode Control Register 1
7 6 5 4 3 2 1 0
Bit symbol
VREFON
I2AD
−
−
− ADCH2
ADCH1
ADCH0
ADMOD1
(12B9H)
Read/Write R/W
After
reset
0 0 0 0 0 0 0 0
Function
VREF
application
control
0: OFF
1: ON
IDLE2
0: Stop
1: Operate
Always
write “0”.
Always write
“0”.
Always
write “0”.
Analog input channel selection
<SCAN>
<ADCH2:0>
0
Channel
fixed
1
Channel
scanned
000
AN0
AN0
001
AN1
AN0
→ AN1
010
AN2
AN0
→ AN1 → AN2
011 (Note)
AN3
AN0
→ AN1 → AN2 → AN3
100 (Note)
AN4
AN0
→ AN1 → AN2 → AN3
→ AN4
101 (Note)
AN5
AN0
→ AN1 → AN2 → AN3
→ AN4 → AN5
110 (Note)
AN6
AN0
→ AN1 → AN2 → AN3
→ AN4 → AN5 → AN6
111 (Note)
AN7
AN0
→ AN1 → AN2 → AN3
→ AN4 → AN5 → AN6 → AN7
0
Stopped
1
In operation
0
OFF
1
ON
AD Mode Control Register 2
7 6 5 4 3 2 1 0
Bit symbol
ADTRGE
ADMOD2
(12BAH)
Read/Write
R/W
After
reset
0
Function
AD conversion
trigger start
control
0: Disable
1. Enable
0
Disabled
1
Enabled
Note:
As pin AN3 also functions as the
ADTRG
input pin, do not set <ADCH2:0> = “011, 100,101,110,111” when
using
ADTRG
with <ADTRGE> set to “1”.
Figure 3.11.3 Register for AD Converter
IDLE2 control
Control of application of reference voltage
to AD converter
Before starting conversion (before writing 1
to ADMOD0<ADS>), set the <VREFON> bit
to 1.
AD conversion start control by external
trigger (
ADTRG
input )
Analog input channel selection