s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 171

• Manufacturer Part Number: s908ab32ag0cfue
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

11.4 Pin Name Conventions
11.5 Functional Description
11.5.1 TIMA Counter Prescaler
MC68HC908AB32
Freescale Semiconductor
—
Rev. 1.1
The TIMA share five I/O pins with port D, E, and F I/O pins. The full name
of the TIMA I/O pin is listed in
in the text that follows.
Figure 11-1
the TIMA is the 16-bit TIMA counter that can operate as a free-running
counter or a modulo up-counter. The TIMA counter provides the timing
reference for the input capture and output compare functions. The TIMA
counter modulo registers, TAMODH:TAMODL, control the modulo value
of the TIMA counter. Software can read the TIMA counter value at any
time without affecting the counting sequence.
The four TIMA channels are programmable independently as input
capture or output compare channels.
The TIMA clock source can be one of the seven prescaler outputs or the
TIMA clock pin, PTD6/TACLK. The prescaler generates seven clock
rates from the internal bus clock. The prescaler select bits, PS[2:0], in
the TIMA status and control register select the TIMA clock source.
TIMA Generic Pin Names:
Timer Interface Module A (TIMA)
shows the structure of the TIMA. The central component of
Table 11-1. Pin Name Conventions
TACLK
TACH0
TACH1
TACH2
TACH3
Table
11-1. The generic pin name appear
Full TIMA Pin Names:
Timer Interface Module A (TIMA)
PTD6/TACLK
PTE2/TACH0
PTE3/TACH1
PTF0/TACH2
PTF1/TACH3
Technical Data
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