mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 205

• Manufacturer Part Number: mc68hc708mp16
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

11.4.1 TIMA Counter Prescaler
11.4.2 Input Capture
11.4.3 Output Compare
MC68HC708MP16
Freescale Semiconductor
Addr.
$0015
$0016
Timer A Channel 1 Register
Timer A Channel 1 Register
Name
—
High (TACH1H)
Low (TACH1L)
Rev. 3.1
Figure 11-2. TIMA I/O Register Summary (Continued)
The TIMA clock source can be one of the seven prescaler outputs or the
TIMA clock pin, PTE0/TCLKA. 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.
With the input capture function, the TIMA can capture the time at which
an external event occurs. When an active edge occurs on the pin of an
input capture channel, the TIMA latches the contents of the TIMA
counter into the TIMA channel registers, TACHxH:TACHxL. The polarity
of the active edge is programmable. Input captures can generate
TIM CPU interrupt requests.
With the output compare function, the TIMA can generate a periodic
pulse with a programmable polarity, duration, and frequency. When the
counter reaches the value in the registers of an output compare channel,
the TIMA can set, clear, or toggle the channel pin. Output compares can
generate TIM CPU interrupt requests.
Reset:
Reset:
Read:
Write:
Read:
Write:
Timer Interface Module A (TIMA)
Bit 7
Bit 15
Bit 7
= Unimplemented
14
6
6
13
5
5
Indeterminate after reset
Indeterminate after reset
12
4
4
11
Timer Interface Module A (TIMA)
3
3
10
2
2
Technical Data
1
9
1
Bit 0
Bit 8
Bit 0
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