![](http://datasheet.mmic.net.cn/330000/MB90F574_datasheet_16437983/MB90F574_34.png)
34
MB90570 Series
(Continued)
Port A data register (PDRA)
Port 9 data register (PDR9)
Address
Address
00000A
H
bit 15 . . . . . . . . . . . .
PA7
R/W
PA6
R/W
PA5
R/W
PA4
R/W
PA3
R/W
PA2
R/W
PA1
R/W
PA0
R/W
(PDRB)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
XXXXXXXX
B
bit 7 . . . . . . . . . . . .
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
(PDR8)
Initial value
XXXXXXXX
B
Initial value
P97
P96
P95
P94
P93
P92
P91
P90
000009
H
Port B data register (PDRB)
Address
00000B
H
bit 15 . . . . . . . . . . . .
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
(PDRA)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
XXXXXXXX
B
Initial value
Port C data register (PDRC)
Address
00000C
H
bit 15 . . . . . . . . . . . .
—
—
—
—
PC3
PC2
PC1
PC0
(Disabled)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
—
—
—
—
R/W
R/W
R/W
R/W
XXXXXXXX
B
Initial value
Port 0 direction register (DDR0)
Address
000010
H
bit 15 . . . . . . . . . . . .
D07
D06
D05
D04
D03
D02
D01
D00
(DDR1)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
00000000
B
Initial value
Port 2 direction register (DDR2)
Address
000012
H
bit 15 . . . . . . . . . . . .
D27
D26
D25
D24
D23
D22
D21
D20
(DDR3)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
00000000
B
Initial value
Port 4 direction register (DDR4)
Address
000014
H
bit 15 . . . . . . . . . . . .
D47
D46
D45
D44
D43
D42
D41
D40
(DDR5)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
00000000
B
Initial value
Port 1 direction register (DDR1)
Address
bit 7 . . . . . . . . . . . .
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
(DDR0)
00000000
B
Initial value
D17
D16
D15
D14
D13
D12
D11
D10
Port 3 direction register (DDR3)
Address
bit 7 . . . . . . . . . . . .
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
(DDR2)
00000000
B
Initial value
D37
D36
D35
D34
D33
D32
D31
D30
000011
H
000013
H