Freescale Semiconductor MC68HC908MR32 - Manual (Page 53)

I/O Registers
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Freescale Semiconductor 53
The voltage levels supplied from internal reference nodes as specified in Table 3-1 are used to verify
the operation of the ADC both in production test and for user applications.
Table 3-1. Mux Channel Select
ADCH4 ADCH3 ADCH2 ADCH1 ADCH0 Input Select
0 0 0 0 0 PTB0/ATD0
0 0 0 0 1 PTB1/ATD1
0 0 0 1 0 PTB2/ATD2
0 0 0 1 1 PTB3/ATD3
0 0 1 0 0 PTB4/ATD4
0 0 1 0 1 PTB5/ATD5
0 0 1 1 0 PTB6/ATD6
0 0 1 1 1 PTB7/ATD7
0 1 0 0 0 PTC0/ATD8
0 1 0 0 1 PTC1/ATD9 (1)
1. ATD9 is not available in the 56-pin SDIP package.
0 1 0 1 0 Unused
(2)
0 1 0 1 1 Ш
0 1 1 0 0 Ш
0 1 1 0 1 Ш
0 1 1 1 0 Ш
0 1 1 1 1 Ш
1 0 0 0 0 Ш
1 1 0 1 0 Unused
(2)
2. Used for factory testing.
1 1 0 1 1 Reserved
(3)
3. If any unused channels are selected, the resulting ADC conversion will be unknown.
1 1 1 0 0 Unused (2)
1 1 1 0 1 V
REFH
1 1 1 1 0 V
REFL
1 1 1 1 1 ADC power off