mc68hc908mr24 Freescale Semiconductor, Inc, mc68hc908mr24 Datasheet - Page 233

• Manufacturer Part Number: mc68hc908mr24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

12.4.1 TIMB Counter Prescaler
MC68HC908MR24 — Rev. 4.1
Freescale Semiconductor
BUS CLOCK
INTERNAL
PTE0/TCLKB
TSTOP
TRST
16-BIT COMPARATOR
16-BIT COMPARATOR
16-BIT COMPARATOR
NOTE:
16-BIT COUNTER
TMODH:TMODL
TCH0H:TCH0L
TCH1H:TCH1L
16-BIT LATCH
16-BIT LATCH
CHANNEL 0
CHANNEL 1
PRESCALER
value of the TIMB counter. Software can read the TIMB counter value at
any time without affecting the counting sequence.
The two TIMB channels are programmable independently as input
capture or output compare channels.
The TIMB module is not available in the 56-pin SDIP.
The TIMB clock source can be one of the seven prescaler outputs or the
TIMB clock pin, PTD4/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.
TCLK
Figure 12-1. TIMB Block Diagram
ELS0B
ELS1B
MS0A
MS1A
Timer Interface B (TIMB)
PS2
PRESCALER SELECT
ELS0A
ELS1A
PS1
CH0F
MS0B
CH1F
PS0
CH0MAX
CH1MAX
CH0IE
CH1IE
TOV0
TOV1
TOIE
TOF
INTER-
LOGIC
LOGIC
INTER-
INTER-
Timer Interface B (TIMB)
LOGIC
PTE1
PTE2
RUPT
LOGIC
LOGIC
RUPT
RUPT
Advance Information
PTE2/TCH1B
PTE1/TCH0B
233