mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 246

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

Timer Interface Module B (TIMB)
Technical Data
246
NOTE:
NOTE:
MSxA — Mode Select Bit A
Before changing a channel function by writing to the MSxB or MSxA bit,
set the TSTOP and TRST bits in the TIMB status and control register
(TBSC).
ELSxB and ELSxA — Edge/Level Select Bits
Before enabling a TIMB channel register for input capture operation,
make sure that the PTE/TCHxB pin is stable for at least two bus clocks.
When ELSxB:A ≠ 00, this read/write bit selects either input capture
operation or unbuffered output compare/PWM operation. (See
12-2.)
When ELSxB:A = 00, this read/write bit selects the initial output level
of the TCHxB pin. (See
When channel x is an input capture channel, these read/write bits
control the active edge-sensing logic on channel x.
When channel x is an output compare channel, ELSxB and ELSxA
control the channel x output behavior when an output compare
occurs.
When ELSxB and ELSxA are both clear, channel x is not connected
to port E, and pin PTEx/TCHxB is available as a general-purpose I/O
pin.
ELSxB and ELSxA bits.
1 = Unbuffered output compare/PWM operation
0 = Input capture operation
1 = Initial output level low
0 = Initial output level high
Table 12-2
Timer Interface Module B (TIMB)
shows how ELSxB and ELSxA work. Reset clears the
Table
12-2.) Reset clears the MSxA bit.
MC68HC708MP16
Freescale Semiconductor
—
Rev. 3.1
Table