Motorola MC68HC908MR32 사용자 설명서
Timer Interface B (TIMB)
Functional Description
MC68HC908MR16/MC68HC908MR32 — Rev. 4.0
Advance Information
MOTOROLA
Timer Interface B (TIMB)
227
Figure 12-1. TIMB Block Diagram
The two TIMB channels are programmable independently as input
capture or output compare channels.
capture or output compare channels.
NOTE:
The TIMB module is not available in the 56-pin SDIP.
12.4.1 TIMB Counter Prescaler
The TIMB clock source can be one of the seven prescaler outputs or the
TIMB clock pin, PTE4/ATD12. The prescaler generates seven clock
rates from the internal bus clock. The prescaler select bits, PS[2:0], in
the TIMB status and control register select the TIMB clock source.
TIMB clock pin, PTE4/ATD12. The prescaler generates seven clock
rates from the internal bus clock. The prescaler select bits, PS[2:0], in
the TIMB status and control register select the TIMB clock source.
PRESCALER
PRESCALER SELECT
TCLK
INTERNAL
16-BIT COMPARATOR
PS2
PS1
PS0
16-BIT COMPARATOR
16-BIT LATCH
TCH0H:TCH0L
MS0A
ELS0B
ELS0A
PTE1
TOF
TOIE
INTER-
CHANNEL 0
TMODH:TMODL
TRST
TSTOP
TOV0
CH0IE
CH0F
CH0MAX
MS0B
16-BIT COUNTER
BUS CLOCK
PTE0/TCLKB
PTE1/TCH0B
PTE2/TCH1B
LOGIC
RUPT
LOGIC
INTER-
RUPT
LOGIC
16-BIT COMPARATOR
16-BIT LATCH
TCH1H:TCH1L
MS1A
ELS1B
ELS1A
PTE2
CHANNEL 1
TOV1
CH1IE
CH1F
CH1MAX
LOGIC
INTER-
RUPT
LOGIC