
Monitor ROM
MC68HC908KX8 MC68HC908KX2 MC68HC08KX8 Data Sheet, Rev. 2.1
Freescale Semiconductor
27
$0022
Timer Counter Register Low
(TCNTL)
Read:
Bit 7
654321
Bit 0
Write:
Reset:
00000000
$0023
Timer Counter Modulo
Register High (TMODH)
Read:
Bit 15
14
13
12
11
10
9
Bit 8
Write:
Reset:
11111111
$0024
Timer Counter Modulo
Register Low (TMODL)
Read:
Bit 7
654321
Bit 0
Write:
Reset:
11111111
$0025
Timer Channel 0 Status and
Control Register (TSC0)
Read:
CH0F
CH0IE
MS0B
MS0A
ELS0B
ELS0A
TOV0
CH0MAX
Write:
0
Reset:
00000000
$0026
Timer Channel 0 Register
High (TCH0H)
Read:
Bit 15
14
13
12
11
10
9
Bit 8
Write:
Reset:
Indeterminate after reset
$0027
Timer Channel 0 Register
Low (TCH0L)
Read:
Bit 7
654321
Bit 0
Write:
Reset:
Indeterminate after reset
$0028
Timer Channel 1 Status and
Control Register (TSC1)
Read:
CH1F
CH1IE
0
MS1A
ELS1B
ELS1A
TOV1
CH1MAX
Write:
0
Reset:
00000000
$0029
Timer Channel 1 Register
High (TCH1H)
Read:
Bit 15
14
13
12
11
10
9
Bit 8
Write:
Reset:
Indeterminate after reset
$002A
Timer Channel 1 Register
Low (TCH1L)
Read:
Bit 7
654321
Bit 0
Write:
Reset:
Indeterminate after reset
$002B
↓
$0035
Unimplemented
$0036
ICG Control Register
(ICGCR)
Read:
CMIE
CMF
CMON
CS
ICGON
ICGS
ECGON
ECGS
Write:
0(1)
Reset:
00001000
$0037
ICG Multiplier Register
(ICGMR)
Read:
N6
N5
N4
N3
N2
N1
N0
Write:
Reset:
00010101
Addr.
Register Name
Bit 7
654321
Bit 0
= Unimplemented
R
= Reserved
U = Unaffected
Figure 2-2. Control, Status, and Data Registers (Sheet 3 of 5)