mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 209

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

12.6 Port D
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
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.
Port D is an 8-bit general-purpose bidirectional I/O port. In 20-pin
package, PTD1 and PTD0 internal pads are bonded together to PTD0/1
pin. Port D pins are open-drain when configured as output, and can
interface with 5V logic.
NOTES:
1. X = don’t care.
2. Hi-Z = high impedance.
3. Writing affects data register, but does not affect input.
DDRC
Bit
0
1
READ DDRC ($0006)
WRITE DDRC ($0006)
WRITE PTC ($0002)
READ PTC ($0002)
PTC Bit
Input/Output Ports (I/O)
X
X
(1)
Table 12-4. Port C Pin Functions
Figure 12-10. Port C I/O Circuit
RESET
I/O Pin Mode
Input, Hi-Z
Output
(2)
DDRCx
PTCx
Read/Write
DDRC[7:0]
DDRC[7:0]
Accesses
to DDRC
Table 12-4
PTC[7:0]
Read
Input/Output Ports (I/O)
Accesses to PTC
Pin
summarizes
Technical Data
PTC[7:0]
PTC[7:0]
Write
Port D
PTCx
(3)
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