Datasheet

I/O Registers
MC68HC908GZ60 • MC68HC908GZ48 • MC68HC908GZ32 Data Sheet, Rev. 6
Freescale Semiconductor 69
The voltage levels supplied from internal reference nodes, as specified in Table 3-1, are used to verify the
operation of the ADC converter both in production test and for user applications.
Table 3-1. Mux Channel Select
(1)
1. If any unused channels are selected, the resulting ADC conversion will be unknown or re-
served.
ADCH4 ADCH3 ADCH2 ADCH1 ADCH0 Input Select
00000 PTB0/AD0
00001 PTB1/AD1
00010 PTB2/AD2
00011 PTB3/AD3
00100 PTB4/AD4
00101 PTB5/AD5
00110 PTB6/AD6
00111 PTB7/AD7
0 1 0 0 0 PTA0/KBD0/AD8
0 1 0 0 1 PTA1/KBD1/AD9
0 1 0 1 0 PTA2/KBD2/AD10
0 1 0 1 1 PTA3/KBD3/AD11
0 1 1 0 0 PTA4/KBD4/AD12
0 1 1 0 1 PTA5/KBD5/AD13
0 1 1 1 0 PTA6/KBD6/AD14
0 1 1 1 1 PTA7/KBD7/AD15
1 0 0 0 0 PTG0/AD16
1 0 0 0 1 PTG1/AD17
1 0 0 1 0 PTG2/AD18
1 0 0 1 1 PTG3/AD19
1 0 1 0 0 PTG4/AD20
1 0 1 0 1 PTG5/AD21
1 0 1 1 0 PTG6/AD22
1 0 1 1 1 PTG7/AD23
1
↓
1
1
↓
1
0
↓
1
0
↓
0
0
↓
0
Unused
11101
V
REFH
11110
V
REFL
1 1 1 1 1 ADC power off