XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 473
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XC908AS60ACFU
Manufacturer Part Number
XC908AS60ACFU
Description
MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
Manufacturer
Motorola Semiconductor Products
Datasheet
1.XC908AS60ACFU.pdf
(576 pages)
- Current page: 473 of 576
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26.4.1 ADC Port I/O Pins
MC68HC908AZ60A — Rev 2.0
MOTOROLA
INTERNAL
DATA BUS
AIEN
INTERRUPT
LOGIC
READ DDRB/DDRB
WRITE DDRB/DDRD
WRITE PTB/PTD
READ PTB/PTD
COCO
BUS CLOCK
CONVERSION
COMPLETE
CGMXCLK
PTD6/ATD14/TACLK
general-purpose I/O pins that share with the ADC channels.
The channel select bits define which ADC channel/port pin will be used
as the input signal. The ADC overrides the port I/O logic by forcing that
pin as input to the ADC. The remaining ADC channels/port pins are
controlled by the port I/O logic and can be used as general-purpose I/O.
Writes to the port register or DDR will not have any affect on the port pin
that is selected by the ADC. Read of a port pin which is in use by the
RESET
Figure 26-1. ADC Block Diagram
Analog-to-Digital Converter (ADC)
ADIV[2:0]
ADC DATA REGISTER
CLOCK
GENERATOR
DDRBx/DDRDx
ADC
PTBx/PTDx
ADC CLOCK
ADICLK
–
PTD0/ATD8 and PTB7/ATD7
ADC VOLTAGE IN
ADCVIN
DISABLE
Analog-to-Digital Converter (ADC)
DISABLE
CHANNEL
SELECT
ADC CHANNEL x
–
PTBx/PTDx
Functional Description
PTB0/ATD0 are
ADCH[4:0]
Technical Data
473
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