參數(shù)資料
型號(hào)： MB90F804
廠商： Fujitsu Limited
英文描述： 16-bit Proprietary Microcontroller CMOS
中文描述： 16位微控制器專有的CMOS
文件頁(yè)數(shù)： 26/88頁(yè)
文件大小： 385K
代理商： MB90F804
MB90800 Series
26
(2) Port direction register
When each terminal functions as a port, each correspondent pin are controlled to following;
0 : Input mode
1 : Output mode This bit becomes “0” after a reset.
Note : When accessing this register by using the instruction of the read modify write system (instructions such as
bit set) is mode, the bit targeted by an instruction becomes the defined value, while the content of the output
register set with the other. Therefore, be sure to write an expected value into PDR firstly, and then set DDR
and finally change to the output when changing the input pin to the output pin is made.
DDR0
Address : 000010
H
Initial Value
00000000
B
Access
R/W
DDR1
Address : 000011
H
00000000
B
R/W
DDR2
Address : 000012
H
00000000
B
R/W
DDR3
Address : 000013
H
00000000
B
R/W
DDR4
Address : 000014
H
00000000
B
R/W
DDR5
Address : 000015
H
00000000
B
R/W
DDR6
Address : 000016
H
00000000
B
R/W
DDR7
Address : 000017
H
-
0000000
B
R/W
DDR8
Address : 000018
H
-
-
-
00000
B
R/W
DDR9
Address : 000019
H
-
-
-
-
-
-
00
B
R/W
7
6
5
4
3
2
1
0
D06
D07
D05
D04
D03
D02
D01
D 00
15
14
13
12
11
10
9
8
D16
D17
D15
D14
D13
D12
D11
D10
7
6
5
4
3
2
1
0
D26
D27
D25
D24
D23
D22
D21
D20
15
14
13
12
11
10
9
8
D36
D37
D35
D34
D33
D32
D31
D30
7
6
5
4
3
2
1
0
D46
D47
D45
D44
D43
D42
D41
D40
15
14
13
12
11
10
9
8
D56
D57
D55
D54
D53
D52
D51
D50
7
6
5
4
3
2
1
0
D66
D67
D65
D64
D63
D62
D61
D60
15
14
13
12
11
10
9
8
D75
D74
D73
D72
D71
D70
D76
7
6
5
4
3
2
1
0
D84
D83
D82
D81
D80
15
14
13
12
11
10
9
8
D91
D90
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