Datasheet

Section 16 A/D Converter
Rev. 3.00 Mar 17, 2006 page 747 of 926
REJ09B0283-0300
Bit Bit Name Initial Value R/W Description
3 CKS 0 R/W Clock Select
Used together with the CKS1 bit in ADCR to set
the A/D conversion time.
When CKS1 = 0
0: 530 states (max)
1: 68 states (max)
When CKS = 1
0: 266 states (max)
1: 134 states (max)
2
1
0
CH2
CH1
CH0
0
0
0
R/W
R/W
R/W
Channel Select 2 to 0
These bits are used together with the SCAN bit in
ADCSR and the CH3 bit in ADCR to select the
analog input channels.
When SCAN = 0, When SCAN = 1,
CH3 = 0 CH3 = 0
0XXX: Setting prohibited 0XXX: Setting
prohibited
100: AN12 100: AN12
101: AN13 101: AN12 and AN13
110: AN14 110: AN12 to AN14
111: AN15 111: AN12 to AN15
When SCAN = 0, When SCAN = 1,
CH3 = 1 CH3 = 1
000: AN0 000: AN0
001: AN1 001: AN0 and AN1
010: AN2 010: AN0 to AN2
011: AN3 011: AN0 to AN3
100: AN4 100: AN4
101: AN5 101: AN4 and AN5
110: AN6 110: AN4 to AN6
111: AN7 111: AN4 to AN7
Legend: X: Don’t care.
Note: * Only 0 can be written in bit 7, to clear the flag.