mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 239

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

17.5 Port C
17.5.1 Port C Data Register
MC68HC908BD48
Freescale Semiconductor
—
Rev. 2.1
Function:
Alternate
Address:
Port C is an 6-bit special-function port that shares all six of its pins with
the analog-to-digital converter (ADC) module.
The port C data register (PTC) contains a data latch for each of the
seven port C pins.
PTC5–PTC0 — Port C Data Bits
ADC5–ADC0 — Analog-to-Digital Input Bits
Reset:
Read:
Write:
These read/write bits are software-programmable. Data direction of
each port C pin is under the control of the corresponding bit in data
direction register C. Reset has no effect on port C data.
ADC5–ADC0 are pins used for the input channels to the analog-to-
digital converter module. The channel select bits in the
and Control Register
input and overrides any control from the port I/O logic by forcing that
pin as the input to the analog circuitry.
$0002
Bit 7
0
Figure 17-9. Port C Data Register (PTC)
Input/Output (I/O) Ports
= Unimplemented
6
0
ADC5
PTC5
define which port C pin will be used as an ADC
5
Unaffected by reset
PTC4
ADC4
4
ADC3
PTC3
3
ADC2
PTC2
2
Input/Output (I/O) Ports
ADC1
PTC1
ADC Status
1
Data Sheet
ADC0
PTC0
Bit 0
239