A/D Control Register (Adcr) - Hitachi SH7032 Hardware Manual

• Bit 3 (Clock Select (CKS)): CKS selects the A/D conversion time. The conversion time should
be changed only when the ADST bit is cleared to 0.
Bit 3 (CKS) Description
0 Conversion time = 266 states (maximum)
1 Conversion time = 134 states (maximum)
• Bits 2–0 (Channel Select 2–0 (CH2–CH0)): CH2–CH0 select analog input channels together
with the SCAN bit. The channel selection should be changed only when the ADST bit is
cleared to 0.
Group Select
CH2
0 0
0
1
1
1 0
0
1
1
14.2.3

A/D Control Register (ADCR)

The A/D control register (ADCR) is an 8-bit read/write register that selects whether or not to start
the A/D conversion when an external trigger is input. ADCR is initialized to H'7F by a reset and in
standby mode.
Bit:
Bit name:
Initial value:
R/W:
Channel Select
CH1
0
1
0
1
0
1
0
1
7 6
TRGE —
0 1
R/W —
CH0 Single Mode
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
5 4 3
— — —
1 1 1
— — —
(Initial value)
Selected Channels
Scan Mode
AN0 (Initial value)
AN0 and AN1
AN0–AN2
AN0–AN3
AN4
AN4 and AN5
AN4–AN6
AN4–AN7
2 1
— —
1 1
— —
0
—
1
—
413