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參數(shù)資料
| 型號(hào)： | P8XC557E8 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 14/84頁 |
| 文件大小： | 322K |
| 代理商： | P8XC557E8 |
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1999 Mar 12
14
Philips Semiconductors
Product specification
8-bit microcontroller
P8xC557E8
8.3
Addressing
The P8xC557E8 has five methods for addressing:
Register
Direct
Register-Indirect
Immediate
Base-Register plus Index-Register-Indirect.
The first three methods can be used for addressing
destination operands. Most instructions have a
‘destination/source’ field that specifies the data type,
addressing methods and operands involved.
For operations other than MOVs, the destination operand
is also a source operand.
Access to memory addresses is as follows:
Register in one of the four register banks through
Register, Direct or Register-Indirect addressing.
Internal RAM (2048 bytes) through Direct or
Register-Indirect addressing.
– Internal RAM: bytes 0 to 127; may be addressed
directly/indirectly.
– Internal RAM: bytes 128 to 255; share their address
location with the SFRs and so may only be addressed
indirectly as data RAM.
– AUX-RAM: bytes 0 to 1791; can only be addressed
indirectly via MOVX.
Special Function Registers through direct addressing at
address locations 128 to 255 (see Fig.7).
External Data Memory through Register-Indirect
addressing.
Program Memory look-up tables through Base-Register
plus Index-Register-Indirect addressing.
Fig.6 Internal MAIN RAM bit addresses.
MBH079
7F
77
6F
67
5F
57
4F
47
3F
37
2F
27
1F
17
0F
07
7E
76
6E
66
5E
56
4E
46
3E
36
2E
26
1E
16
0E
06
7D
75
6D
65
5D
55
4D
45
3D
35
2D
25
1D
15
0D
05
7C
74
6C
64
5C
54
4C
44
3C
34
2C
24
1C
14
0C
04
7B
73
6B
63
5B
53
4B
43
3B
33
2B
23
1B
13
0B
03
7A
72
6A
62
5A
52
4A
42
3A
32
2A
22
1A
12
0A
02
79
71
69
61
59
51
49
41
39
31
29
21
19
11
09
01
78
70
68
60
58
50
48
40
38
30
28
20
18
10
08
00
18H
17H
10H
0FH
08H
07H
00H
24
23
31
16
15
8
7
0
BANK 0
BANK 1
BANK 2
BANK 3
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
(MSB)
(LSB)
255
FFH
2FH
2EH
2DH
2CH
2BH
2AH
29H
28H
27H
26H
25H
24H
23H
22H
21H
20H
1FH
BYTE
ADDRESS
(DECIMAL)
BYTE
ADDRESS
(HEX)
BIT ADDRESS
(HEX)
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