mc68hc08az60 Freescale Semiconductor, Inc, mc68hc08az60 Datasheet - Page 257

• Manufacturer Part Number: mc68hc08az60
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

I/ O Signals
TIMB Clock Pin
(PTD4/TBLCK)
TIMB Channel I/O
Pins
(PTF5/TBCH1–PTF4/
TBCH0)
15-timb
MOTOROLA
Port D shares one of its pins with the TIMB. Port F shares two of its pins
with the TIMB. PTD4/TBLCK is an external clock input to the TIMB
prescaler. The two TIMB channel I/O pins are PTF4/TBCH0 and
PTF5/TBCH1.
PTD4/TBLCK is an external clock input that can be the clock source for
the TIMB counter instead of the prescaled internal bus clock. Select the
PTD4/TBLCK input by writing logic 1s to the three prescaler select bits,
PS[2:0]. (See TIMB Status and Control Register.) The minimum TCLK
pulse width, TCLK
The maximum TCLK frequency is the least: 4 MHz or bus frequency 2.
PTD4/TBLCK is available as a general-purpose I/O pin or ADC channel
when not used as the TIMB clock input. When the PTD6/TACLK pin is
the TIMB clock input, it is an input regardless of the state of the DDRD6
bit in data direction register D.
Each channel I/O pin is programmable independently as an input
capture pin or an output compare pin. PTF4/TBCH0 and PTF5/TBCH1
can be configured as buffered output compare or buffered PWM pins.
Freescale Semiconductor, Inc.
For More Information On This Product,
Timer Interface Module B (TIMB)
Go to: www.freescale.com
LMIN
or TCLK
------------------------------------ -
bus frequency
HMIN
1
, is:
+
t
SU
Timer Interface Module B (TIMB)
MC68HC08AZ60 — Rev 1.0
I/O Signals
257