MC68HC908AB32 MOTOROLA [Motorola, Inc], MC68HC908AB32 Datasheet - Page 197
MC68HC908AB32
Manufacturer Part Number
MC68HC908AB32
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AB32.pdf
(392 pages)
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12.4 Pin Name Conventions
12.5 Functional Description
12.5.1 TIMB Counter Prescaler
MC68HC908AB32
MOTOROLA
—
Rev. 1.0
The TIMB share five I/O pins with port D and F I/O pins. The full name
of the TIMB I/O pin is listed in
in the text that follows.
Figure 12-1
the TIMB is the 16-bit TIMB counter that can operate as a free-running
counter or a modulo up-counter. The TIMB counter provides the timing
reference for the input capture and output compare functions. The TIMB
counter modulo registers, TBMODH:TBMODL, control the modulo value
of the TIMB counter. Software can read the TIMB counter value at any
time without affecting the counting sequence.
The four TIMB channels are programmable independently as input
capture or output compare channels.
The TIMB clock source can be one of the seven prescaler outputs or the
TIMB clock pin, PTD4/TBCLK. The prescaler generates seven clock
rates from the internal bus clock. The prescaler select bits, PS[2:0], in
the TIMB status and control register select the TIMB clock source.
Freescale Semiconductor, Inc.
For More Information On This Product,
TIMB Generic Pin Names:
Timer Interface Module B (TIMB)
Go to: www.freescale.com
shows the structure of the TIMB. The central component of
Table 12-1. Pin Name Conventions
TBCLK
TBCH0
TBCH1
TBCH2
TBCH3
Table
12-1. The generic pin name appear
Full TIMB Pin Names:
Timer Interface Module B (TIMB)
PTD4/TBCLK
PTF4/TBCH0
PTF5/TBCH1
PTF2/TBCH2
PTF3/TBCH3
Pin Name Conventions
Technical Data
197
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