mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 236

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Input/Output (I/O) Ports
17.4 Port B
17.4.1 Port B Data Register
Data Sheet
236
Function:
Address:
Alternate
Port B is an 8-bit special-function port that shares all eight of its pins with
the pulse width modulator (PWM).
The port B data register (PTB) contains a data latch for each of the eight
port pins.
PTB7–PTB0 — Port B Data Bits
PWM7–PWM0 — PWM Outputs 7–0
Reset:
Read:
Write:
These read/write bits are software-programmable. Data direction of
each port B pin is under the control of the corresponding bit in data
direction register B. Reset has no effect on port B data.
The PWM output enable bits PWM7E–PWM0E, in PWM control
register 1 (PWMCR1) enable port B pins as PWM output pins. (See
17.4.3 Port B
PWM7
$0001
PTB7
Bit 7
Figure 17-5. Port B Data Register (PTB)
Input/Output (I/O) Ports
PWM6
PTB6
Options.)
6
PWM5
PTB5
5
Unaffected by reset
PWM4
PTB4
4
PWM3
PTB3
3
MC68HC908BD48
PWM2
PTB2
Freescale Semiconductor
2
PWM1
PTB1
1
—
Rev. 2.1
PWM0
PTB0
Bit 0