MC68HC908AS60ACFN FREESCALE [Freescale Semiconductor, Inc], MC68HC908AS60ACFN Datasheet - Page 321

• Manufacturer Part Number: MC68HC908AS60ACFN
• Description: M68HC08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

CHxF — Channel x Flag Bit
CHxIE — Channel x Interrupt Enable Bit
MSxB — Mode Select Bit B
MSxA — Mode Select Bit A
Freescale Semiconductor
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 logic 0 to CHxF. If another interrupt request occurs before the clearing sequence is
complete, then writing logic 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 logic 1 to CHxF has no effect.
This read/write bit enables TIMA CPU interrupts on channel x.
Reset clears the CHxIE bit.
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.
Setting MS0B disables the channel 1 status and control register and reverts TACH1 pin to
general-purpose I/O.
Setting MS2B disables the channel 3 status and control register and reverts TACH3 pin to
general-purpose I/O.
Setting MS4B disables the channel 5 status and control register and reverts TACH5 pin to
general-purpose I/O.
Reset clears the MSxB bit.
When ELSxB:A ≠ 00, this read/write bit selects either input capture operation or unbuffered output
compare/PWM operation. See
1 = Input capture or output compare on channel x
0 = No input capture or output compare on channel x
1 = Channel x CPU interrupt requests enabled
0 = Channel x CPU interrupt requests disabled
1 = Buffered output compare/PWM operation enabled
0 = Buffered output compare/PWM operation disabled
1 = Unbuffered output compare/PWM operation
0 = Input capture operation
Figure 25-7. TIMA Channel Status and Control Registers (TASC0–TASC5) (Continued)
Register Name and Address
Reset:
Read:
Write:
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
CH5F
Bit 7
R
0
0
= Reserved
CH5IE
6
0
Table
TASC5 — $0035
25-2.
5
0
R
0
MS5A
4
0
ELS5B
3
0
ELS5A
2
0
TOV5
1
0
CH5MAX
Bit 0
0
I/O Registers
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