HD6433308 HITACHI [Hitachi Semiconductor], HD6433308 Datasheet - Page 341

• Manufacturer Part Number: HD6433308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

ADCSR—A/D Control/Status Register
Bit
Initial value
Read/Write R/(W)*
* Software can write a “0” in bit 7 to clear the flag, but cannot write a “1” in this bit.
A/D End Flag
1 Set to “1” at the following times:
0 Cleared from “1” to “0” when CPU reads ADF = “1,” then writes “0” in ADF.
1. Single mode: at the completion of A/D conversion
2. Scan mode: when all selected channels have been converted.
A/D Interrupt Enable
0 The A/D interrupt request (ADI) is disabled.
1 The A/D interrupt request (ADI) is enabled.
0 A/D conversion is halted.
1 1. Single mode: One A/D conversion is performed, then this bit is automatically cleared to “0.”
2. Scan mode: A/D conversion starts and continues cyclically on all selected channels until “0”
is written in this bit.
ADF
7
0
ADIE
R/W
6
0
A/D Start
ADST
R/W
5
0
Scan Mode
0 Single mode
1 Scan mode
SCAN
R/W
4
0
333
Clock Select
0 Conversion time = 242 states (max)
1 Conversion time = 122 states (max)
CH2 CH1 CH0 Single mode Scan mode
0
1
Channel Select
CKS
R/W
3
0
H’FFE8
0
0
1
1
0
0
1
1
R/W
CH2
0
1
0
1
0
1
0
1
2
0
AN
AN
AN
AN
AN
AN
AN
AN
CH1
R/W
0
1
2
3
4
5
6
7
1
0
A/D
CH0
R/W
AN
AN
AN
AN
AN
AN
AN
AN
0
0
0
0
0
0
4
4
4
4
, AN
, AN
to AN
to AN
to AN
to AN
1
5
2
3
6
7