Datasheet

Functional Description
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
Freescale Semiconductor 157
Figure 15-2. TIM Block Diagram
Addr.Register Name Bit 7654321Bit 0
$0020
Timer Status and Control
Register (TSC)
See page 163.
Read: TOF
TOIE TSTOP
00
PS2 PS1 PS0
Write: 0 TRST
Reset:00100000
$0021
Timer Counter Register High
(TCNTH)
See page 164.
Read: Bit 15 14 13 12 11 10 9 Bit 8
Write:
Reset:00000000
$0022
Timer Counter Register Low
(TCNTL)
See page 164.
Read:Bit 7654321Bit 0
Write:
Reset:00000000
$0023
Timer Counter Modulo
Register High (TMODH)
See page 165.
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
Reset:11111111
= Unimplemented
Figure 15-3. TIM I/O Register Summary
PRESCALER
PRESCALER SELECT
INTERNAL
16-BIT COMPARATOR
PS2 PS1 PS0
16-BIT COMPARATOR
16-BIT LATCH
TCH0H:TCH0L
MS0A
ELS0B ELS0A
PORT
TOF
TOIE
INTER-
16-BIT COMPARATOR
16-BIT LATCH
TCH1H:TCH1L
CHANNEL 0
CHANNEL 1
TMODH:TMODL
TRST
TSTOP
TOV0
CH0IE
CH0F
ELS1B ELS1A
TOV1
CH1IE
CH1MAX
CH1F
CH0MAX
MS0B
16-BIT COUNTER
INTERNAL BUS
BUS CLOCK
MS1A
LOGIC
RUPT
LOGIC
INTER-
RUPT
LOGIC
PORT
LOGIC
INTER-
RUPT
LOGIC
PTA2/KBD2/TCH0
PTA3/KBD3
/TCH1