Toshiba TMP92CM22FG Computer Hardware User Manual


 
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
0OFF
1ON
AD Mode Control Register 2
7 6 5 4 3 2 1 0
Bit symbol ADTRGEADMOD2
(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