MC68HC908GR4 MOTOROLA [Motorola, Inc], MC68HC908GR4 Datasheet - Page 218

• Manufacturer Part Number: MC68HC908GR4
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Input/Output Ports (I/O)
Technical Data
218
PTCPUE Bit
Notes:
1. X = Don’t care
2. Hi-Z = High impedance
3. Writing affects data register, but does not affect input.
4. I/O pin pulled up to V
X
1
0
DDRC Bit
0
0
1
DD
When bit DDRCx is a logic 1, reading address $0002 reads the PTCx
data latch. When bit DDRCx is a logic 0, reading address $0002 reads
the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit.
the operation of the port C pins.
PTC Bit
by internal pullup device.
Freescale Semiconductor, Inc.
X
X
X
For More Information On This Product,
(1)
Table 16-4. Port C Pin Functions
READ DDRC ($0006)
WRITE DDRC ($0006)
WRITE PTC ($0002)
READ PTC ($0002)
PTCPUEx
I/O Pin Mode
Input, Hi-Z
Input, V
Go to: www.freescale.com
Input/Output Ports (I/O)
Output
DD
Figure 16-11. Port C I/O Circuit
RESET
(4)
(2)
V
DD
Accesses to DDRC
INTERNAL
PULLUP
DEVICE
DDRC1–DDRC0
DDRC1–DDRC0
DDRC1–DDRC0
Read/Write
DDRCx
PTCx
PTC1–PTC0
Table 16-4
MC68HC908GR8 — Rev 4.0
Read
Pin
Pin
Accesses to PTC
PTC1–PTC0
PTC1–PTC0
summarizes
PTC1–PTC0
MOTOROLA
Write
PTCx
(3)
(3)