MMC2001
PROGRAMMING REFERENCE
MOTOROLA
REFERENCE MANUAL
C-13
Figure C-15 PIT Data Register
C.3.11 PIT Alternate Data Register (ITADR)
The PIT alternate data register is a read-only register which provides access to the
counter value. Access this register with 32-bit loads and stores only.
Figure C-16 PIT Alternate Data Register
C.4 KPP Programming Model
ITDR — PIT Data Register
10001028
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
RESET:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
PIT DATA
W
RESET:
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
ITADR — PIT Alternate Data Register
1000102C
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
RESET:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
PIT COUNTER
W
RESET:
Table C-4 Keypad Port Address Map
Address
Use
Access
10003000
Keypad Control Register (KPCR)
Supervisor Only
10003002
Keypad Status Register (KPSR)
Supervisor Only
10003004
Keypad Data Direction Register (KDDR)
Supervisor Only
10003006
Keypad Data Register (KPDR)
Supervisor Only
10003008
to
10003FFF
Reserved
Supervisor Only
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