HD6433802H Datasheet, PDF (305/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

Bit 7: Clock select (CKS)
Bit 7 sets the A/D conversion speed.
Bit 7
Conversion Time
CKS
Conversion Period
ø = 1 MHz
ø = 5 MHz
0
62/ø (initial value)
62 µs
12.4 µs
1
31/ø
31 µs
—*
Note: * Operation is not guaranteed if the conversion time is less than 12.4 µs. Set bit 7 for a value
of at least 12.4 µs.
Bit 6: Reserved bit
Bit 6 is reserved; only 0 can be written to this bit.
Bits 5 and 4: Reserved bits
Bits 5 and 4 are reserved; they are always read as 1, and cannot be modified.
Bits 3 to 0: Channel select (CH3 to CH0)
Bits 3 to 0 select the analog input channel.
The channel selection should be made while bit ADSF is cleared to 0.
Bit 3
CH3
0
0
0
0
0
1
1
1
1
Bit 2
CH2
0
1
1
1
1
0
0
0
0
Bit 1
CH1
*
0
0
1
1
0
0
1
1
Bit 0
CH0
*
0
1
0
1
0
1
0
1
Analog Input Channel
No channel selected
AN₀
AN₁
AN₂
AN₃
Setting prohibited
(initial value)
*: Don’t care
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