MC68HC908GR4 MOTOROLA [Motorola, Inc], MC68HC908GR4 Datasheet - Page 223

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

MC68HC908GR8 — Rev 4.0
MOTOROLA
PTDPUE 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
DDRD Bit
0
0
1
DD
When bit DDRDx is a logic 1, reading address $0003 reads the PTDx
data latch. When bit DDRDx is a logic 0, reading address $0003 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 D pins.
by internal pullup device.
PTD Bit
Freescale Semiconductor, Inc.
X
X
X
(1)
For More Information On This Product,
Table 16-5. Port D Pin Functions
READ DDRD ($0007)
WRITE DDRD ($0007)
WRITE PTD ($0003)
READ PTD ($0003)
PTDPUEx
I/O Pin Mode
Input, V
Input, Hi-Z
Go to: www.freescale.com
Output
Input/Output Ports (I/O)
DD
Figure 16-15. Port D I/O Circuit
(4)
(2)
RESET
Accesses to DDRD
VDD
DDRD6–DDRD0
DDRD6–DDRD0
DDRD6–DDRD0
INTERNAL
PULLUP
DEVICE
Read/Write
DDRDx
PTDx
PTD6–PTD0
Table 16-5
Read
Pin
Pin
Accesses to PTD
Input/Output Ports (I/O)
PTD6–PTD0
PTD6–PTD0
summarizes
PTD6–PTD0
Technical Data
Write
Port D
PTDx
(3)
(3)
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