HD6475348R Datasheet, PDF (302/487 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

Bit 5—A/D Start (ADST): The A/D converter operates while this bit is set to 1. In the single
mode, this bit is automatically cleared to 0 at the end of each A/D conversion.
Bit 5
ADST
0
1
Description
A/D conversion is halted.
(Initial value)
1. Single mode: One A/D conversion is performed. The ADST bit is automatically
cleared to 0 at the end of the conversion.
2. Scan mode: A/D conversion starts and continues cyclically on the selected channels
until the ADST bit is cleared to 0.
Bit 4—Scan Mode (SCAN): This bit selects the scan mode or single mode of operation.
See section 15.4, “Operation” for descriptions of these modes.
The mode should be changed only when the ADST bit is cleared to 0.
Bit 4
SCAN
0
1
Description
Single mode
Scan mode
(Initial value)
Bit 3—Clock Select (CKS): This bit controls the A/D conversion time.
The conversion time should be changed only when the ADST bit is cleared to 0.
Bit 3
CKS
0
1
Description
Conversion time = 274 states (maximum)
Conversion time = 138 states (maximum)
(Initial value)
Bits 2 to 0—Channel Select 2 to 0 (CH2 to CH0): These bits and the SCAN bit combine to
select one or more analog input channels.
The channel selection should be changed only when the ADST bit is cleared to 0.
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