A/D Control Register 1 (Adc1) - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 23 10-BIT A/D CONVERTER
23.4.1

A/D Control Register 1 (ADC1)

A/D control register 1 (ADC1) is used to enable and disable individual functions of the
10-bit A/D converter, select an analog input pin, and to check the states.
A/D Control Register 1 (ADC1)
Address
ANS3 ANS2 ANS1 ANS0
006C
H
R/W
R/WX
R0,W
R(RM1),W
Do not select the unusable channel for this series by analog input channel select bits.
418
Figure 23.4-2 A/D Control Register 1 (ADC1)
bit7 bit6 bit5 bit4
R/W R/W R/W R/W
ADMVX
ADMV
ADI
ANS3
: Readable/writable (Read value is the same as write value)
: Read only (Readable, writting has no effect on operation)
: Write only (Writable, "0" is read)
: Readable/writable (Read value is different from write value,
"1" is read by read-modfy-write instruction)
: Initial value
bit3 bit2 bit1
ADI ADMV ADMVX
R/WX R/W
R(RM1),W
AD
A/D conversion start bit
0 Do not start A/D conversion.
1
Start A/D conversion.
Current cut-off analog switch control bit
0 Turn on analog switch only during conversion.
1 Maintain analog switch on.
Conversion flag bit
0 Not converting
1 Currently converting
Interrupt request flag bit
Read
0
Conversion not completed
1
Conversion completed
ANS2 ANS1 ANS0
0 0 0
0 0 0
0 0 1
0 0 1
0 1 0
0 1 0
0 1 1
0 1 1
bit0 Initial value
AD 00000000
R0,W
Write
Clear this bit.
Make no changes to the bit
with no effect on others.
Analog input channel select bits
0
AN00 pin
1
AN01 pin
0
AN02 pin
1
AN03 pin
0
AN04 pin
1
AN05 pin
0
AN06 pin
1
AN07 pin
B