MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 170
MC68HC908QY2
Manufacturer Part Number
MC68HC908QY2
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908QY2.pdf
(230 pages)
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Input/Output (I/O) Ports
170
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
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
Bit
X
1
0
DDRB
Bit
0
0
1
DD
by internal pullup.
PTB
X
Bit
X
X
(1)
PTBPUE[7:0] — Port B Input Pullup Enable Bits
Table 12-3
These read/write bits are software programmable to enable pullup
devices on port B pins
1 = Corresponding port B pin configured to have internal pull if its
0 = Pullup device is disconnected on the corresponding port B pin
Input, V
Input, Hi-Z
Table 12-3. Port B Pin Functions
I/O Pin
Output
Mode
DDRB bit is set to 0
regardless of the state of its DDRB bit.
summarizes the operation of the port B pins.
DD
Input/Output (I/O) Ports
(2)
(4)
Accesses to DDRB
DDRB7–DDRB0
DDRB7–DDRB0
DDRB7–DDRB0
Read/Write
PTB7–PTB0
Read
Pin
Pin
Accesses to PTB
PTB7–PTB0
PTB7–PTB0
PTB7–PTB0
MOTOROLA
Write
(3)
(3)
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