Datasheet

Analog-to-Digital Converter (ADC)
I/O Registers
MC68HC908GR8 — Rev 4.0 Technical Data
MOTOROLA Analog-to-Digital Converter (ADC) 87
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.
00011 PTB3/ATD3
00100 PTB4/ATD4
00101 PTB5/ATD5
00110 Reserved
00111 Reserved
↓↓↓↓↓ Reserved
11011 Reserved
11100 Reserved
11101
V
REFH
11110
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.
Table 5-1. Mux Channel Select
ADCH4 ADCH3 ADCH2 ADCH1 ADCH0 Input Select
Address: $0003D
Bit 7654321Bit 0
Read: AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0
Write:
Reset:00000000
= Unimplemented
Figure 5-3. ADC Data Register (ADR)
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...