MC68HC908AT32 Datasheet, PDF (312/378 Pages) Freescale Semiconductor, Inc – Microcontrollers

Analog-to-Digital Converter (ADC-15)
Table 26-1. MUX Channel Select
ADCH4
0
0
0
0
0
1
1
1
1
1
ADCH3
1
1
1
1
1
ADCH2
0
0
1
1
1
ADCH1
1
1
0
0
1
Range 01111 ($0F) to 11010 ($1A)
1
0
1
1
1
0
1
1
0
1
1
1
1
1
1
ADCH0
0
1
0
1
0
1
0
1
0
1
Input Select
PTD2/ATD10
PTD3/ATD11
PTD4/ATD12/TBCLK
PTD5/ATD13
PTD6/ATD14/TACLK
Unused⁽¹⁾
Unused⁽¹⁾
Reserved
V_DDA/V_DDAREF(2)
V_REFH(2)
V_SSA/V_REFL(2)
[ADC power off]
1. If any unused channels are selected, the resulting ADC conversion will be unknown.
2. The voltage levels supplied from internal reference nodes as specified in the table
are used to verify the operation of the ADC converter both in production test and for user
applications.
26.7.2 ADC Data Register
One 8-bit result register is provided. This register is updated each time an ADC conversion completes.
Address: $0039
Bit 7
6
5
4
3
2
1
Bit 0
Read: AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
Write: R
R
R
R
R
R
R
R
Reset:
Indeterminate after reset
R
= Reserved
Figure 26-3. ADC Data Register (ADR)
MC68HC908AT32 Data Sheet, Rev. 3.1
312
Freescale Semiconductor