MC908GR8CDWE Datasheet, PDF (87/408 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Freescale Semiconductor, Inc.
Analog-to-Digital Converter (ADC)
I/O Registers
Table 5-1. Mux Channel Select
ADCH4 ADCH3 ADCH2 ADCH1 ADCH0
Input Select
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
Reserved
0
0
1
1
1
Reserved
↓
↓
↓
↓
↓
Reserved
1
1
0
1
1
Reserved
1
1
1
0
0
Reserved
1
1
1
0
1
V_REFH
1
1
1
1
0
V_REFL
1
1
1
1
1
ADC power off
NOTE: If an unknown channel is selected it should be made clear what value the user will read
from the ADC Data Register, unknown or reserved is not specific enough.
5.8.2 ADC Data Register
One 8-bit result register, ADC data register (ADR), is provided. This
register is updated each time an ADC conversion completes.
Address: $0003D
Bit 7
6
5
4
3
2
1
Bit 0
Read: AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
Write:
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 5-3. ADC Data Register (ADR)
MC68HC908GR8 — Rev 4.0
MOTOROLA
Analog-to-Digital Converter (ADC)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
87