MC68HC08BD24 Datasheet, PDF (196/244 Pages) Motorola, Inc – HCMOS Microcontroller Unit

15.4 Port B
Port B is an 8-bit special-function port that shares all eight of its pins with
the pulse width modulator (PWM).
15.4.1 Port B Data Register
The port B data register (PTB) contains a data latch for each of the eight
port pins.
Address: $0001
Read:
Write:
Bit 7
PTB7
6
PTB6
5
PTB5
4
PTB4
3
PTB3
2
PTB2
1
PTB1
Reset:
Unaffected by reset
Alternate
Function:
PWM7
PWM6
PWM5
PWM4
PWM3
PWM2
PWM1
Figure 15-5. Port B Data Register (PTB)
Bit 0
PTB0
PWM0
PTB7–PTB0 — Port B Data Bits
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.
PWM7–PWM0 — PWM Outputs 7–0
The PWM output enable bits PWM7E–PWM0E, in PWM control
register 1 (PWMCR1) enable port B pins as PWM output pins. (See
15.4.3 Port B Options.)
Technical Data
196
MC68HC08BD24 — Rev. 1.1
Freescale Semiconductor