mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 117

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908QF4 — Rev. 1.0
MOTOROLA
1. X = don’t care
2. I/O pin pulled to V
3. Writing affects data register, but does not affect input.
4. Hi-Z = high impedance
PTBPUE
Bit
X
1
0
DDRB
Bit
0
0
1
DD
by internal pullup.
PTBPUE[7:0] — Port B Input Pullup Enable Bits
Table 13-3
PTB
X
Bit
These read/write bits are software programmable to enable pullup devices on
port B pins
X
X
(1)
1 = Corresponding port B pin configured to have internal pull if its DDRB bit
0 = Pullup device is disconnected on the corresponding port B pin regardless
Freescale Semiconductor, Inc.
For More Information On This Product,
is set to 0
of the state of its DDRB bit.
Input, Hi-Z
Input, V
summarizes the operation of the port B pins.
Table 13-3. Port B Pin Functions
I/O Pin
Output
Mode
DD
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(2)
(4)
Input/Output (I/O) Ports
Accesses to DDRB
DDRB7–DDRB0
DDRB7–DDRB0
DDRB7–DDRB0
Read/Write
PTB7–PTB0
Read
Pin
Pin
Accesses to PTB
Input/Output (I/O) Ports
PTB7–PTB0
PTB7–PTB0
PTB7–PTB0
Write
Data Sheet
Port B
(3)
(3)
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