7220 Datasheet, PDF (264/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPENDIX
6.7 Control registers
A-D Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
A-D control register 1 (AD1) [Address 00EE 16]
B
Name
0 Analog input pin selection
to bits
2 (ADM0, ADM1, ADM2)
Functions
b2 b1 b0
0 0 0 : A-D1
0 0 1 : A-D2
0 1 0 : A-D3
0 1 1 : A-D4
1 0 0 : A-D5
1 0 1 : A-D6
1 1 0:
1 1 1:
Do not set.
After reset R W
0 _RW
3 Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
4 ^{Storage bit of comparison}
result (ADM4)
0: Input voltage < reference voltage
1: Input voltage > reference voltage
5
to
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
7
0 _R—
Indeterminate R W
0 _R—
Fig. 6.7.22 A-D control register 1
Address 00EE16
A-D Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
A-D control register 2(AD2) [Address 00EF 16]
B
Name
0 D-A converter set bits
to (ADC0, ADC1, ADC2,
5 ADC3, ADC4, ADC5)
Functions
b5 b4 b3 b2 b1 b0
0 0 0 0 0 0 : 1/128Vcc
0 0 0 0 0 1 : 3/128Vcc
0 0 0 0 1 0 : 5/128Vcc
After reset R W
0
RW
1 1 1 1 0 1 : 123/128Vcc
1 1 1 1 1 0 : 125/128Vcc
1 1 1 1 1 1 : 127/128Vcc
6, 7 Nothing is assigned. These bits are write disable bits.
When these bits are reed out, the values are “ 0.”
0
R—
Fig. 6.7.23 A-D control register 2
Address 00EF16
7220 Group User’s Manual
6-45