MC68HC908RK2 Datasheet, PDF (121/158 Pages) Motorola, Inc – Microcontroller Unit

PTB3/TCLK
INTERNAL
BUS CLOCK
TSTOP
TRST
PRESCALER
PRESCALER SELECT
PS2
PS1
PS0
16-BIT COUNTER
16-BIT COMPARATOR
TMODH:TMODL
CHANNEL 0
16-BIT COMPARATOR
TCH0H:TCH0L
16-BIT LATCH
CHANNEL 1
16-BIT COMPARATOR
TCH1H:TCH1L
16-BIT LATCH
TOF
TOIE
ELS0B ELS0A
TOV0
CH0MAX
CH0F
MS0A
ELS1B ELS1A
MS0B
CH0IE
TOV1
CH1MAX
CH1F
MS1A
CH1IE
Figure 11-2. TIM Block Diagram
Functional Description
INTER-
RUPT
LOGIC
PORT
LOGIC
INTER-
RUPT
LOGIC
PTB2/TCH0
PORT
LOGIC
INTER-
RUPT
LOGIC
PTB4/TCH1
Addr.
Register Name
Bit 7
6
5
4
3
Timer Status and Control ^{Read: TOF}
TOIE TSTOP
0
0
$0020
Register (TSC) Write: 0
TRST
See page 128. _Reset:
0
0
1
0
0
Timer Counter Register High ^{Read: Bit 15}
14
13
12
11
$0021
(TCNTH) Write:
See page 129. _Reset:
0
0
0
0
0
Timer Counter Register Low ^{Read: Bit 7}
6
5
4
3
$0022
(TCNTL) Write:
See page 129. _Reset:
0
0
0
0
0
Timer Counter Modulo ^Read: _{Bit 15}
14
13
12
11
$0023
Register High (TMODH) Write:
See page 130. _Reset:
1
1
1
1
1
= Unimplemented
Figure 11-3. TIM I/O Register Summary
Freescale Semiconductor
MC68HC908RK2 Data Sheet, Rev. 5.1
2
1
Bit 0
PS2
PS1
PS0
0
0
0
10
9
Bit 8
0
0
0
2
1
Bit 0
0
0
0
10
9
Bit 8
1
1
1
121