MC68HC08AZ32A Datasheet, PDF (250/312 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Timer Interface Module A (TIMA)
Register Name and Address
TASC2 — $002C
Read:
Write:
Bit 7
CH2F
0
6
CH2IE
5
MS2B
4
MS2A
3
ELS2B
2
ELS2A
1
TOV2
Bit 0
CH2MAX
Reset: 0
0
0
0
0
0
0
0
Register Name and Address
TASC3 — $002F
Bit 7
6
5
4
3
2
1
Bit 0
Read: CH3F
0
CH3IE
MS3A ELS3B ELS3A TOV3 CH3MAX
Write: 0
R
Reset: 0
0
0
0
0
0
0
0
Register Name and Address
Bit 7
6
Read: CH4F
Write: 0
CH4IE
Reset: 0
0
Register Name and Address
TASC4 — $0032
5
4
MS4B MS4A
0
0
TASC5 — $0035
3
ELS4B
0
2
ELS4A
0
1
TOV4
0
Bit 0
CH4MAX
0
Bit 7
6
5
4
3
2
1
Bit 0
Read: CH5F
0
CH5IE
MS5A ELS5B ELS5A TOV5 CH5MAX
Write: 0
R
Reset: 0
0
0
0
0
0
0
0
R
= Reserved
Figure 17-8. TIMA Channel Status and Control Registers
(TASC0–TASC5) (Sheet 2 of 2)
CHxF — Channel x Flag Bit
When channel x is an input capture channel, this read/write bit is set when an active edge occurs on
the channel x pin. When channel x is an output compare channel, CHxF is set when the value in the
TIMA counter registers matches the value in the TIMA channel x registers.
When CHxIE = 1, clear CHxF by reading TIMA channel x status and control register with CHxF set and
then writing a 0 to CHxF. If another interrupt request occurs before the clearing sequence is complete,
then writing 0 to CHxF has no effect. Therefore, an interrupt request cannot be lost due to inadvertent
clearing of CHxF.
Reset clears the CHxF bit. Writing a 1 to CHxF has no effect.
1 = Input capture or output compare on channel x
0 = No input capture or output compare on channel x
CHxIE — Channel x Interrupt Enable Bit
This read/write bit enables TIMA CPU interrupts on channel x.
Reset clears the CHxIE bit.
1 = Channel x CPU interrupt requests enabled
0 = Channel x CPU interrupt requests disabled
MSxB — Mode Select Bit B
This read/write bit selects buffered output compare/PWM operation. MSxB exists only in the TIMA
channel 0, TIMA channel 2 and TIMA channel 4 status and control registers.
MC68HC08AZ32A Data Sheet, Rev. 2
250
Freescale Semiconductor