参数资料
型号: MB90487BPFV
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP100
封装: 14 X 14 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-100
文件页数: 52/124页
文件大小: 1547K
代理商: MB90487BPFV
MB90480B/485B Series
33
■ PERIPHERAL RESOURCES
1.
I/O Ports
The I/O ports perform the functions of either sending data from the CPU to the I/O pins, or loading information
from the I/O into the CPU, according to the setting of the corresponding port data register (PDR) . The input/
output direction of each I/O pin can be set in individual bit units by the port direction register (DDR) for each I/
O port.
The MB90480B/485B series has 84 input/output pins. The I/O ports are port 0 through port A.
(1) Port Data Registers
*1 : The R/W indication for I/O ports is somewhat different than R/W access to memory, and involves the following
operations.
Input mode
Read : Reads the corresponding signal pin level.
Write : Writes to the output latch.
Output mode
Read : Reads the value from the data register latch.
Write : Outputs the value to the corresponding signal pin.
*2 : The initial value of this bit is “11XXXXXXB” on MB90485B series.
PDR0
Initial value
Access
Address : 000000H
Undefined
R/W
*1
PDR1
Address : 000001H
Undefined
R/W
*1
PDR2
Address : 000002H
Undefined
R/W
*1
PDR3
Address : 000003H
Undefined
R/W
*1
PDR4
Address : 000004H
Undefined
R/W
*1
PDR5
Address : 000005H
Undefined
R/W
*1
PDR6
Address : 000006H
Undefined
R/W
*1
PDR7
Address : 000007H
Undefined
*2 R/W*1
PDR8
Address : 000008H
Undefined
R/W
*1
PDR9
Address : 000009H
Undefined
R/W
*1
PDRA
Address : 00000AH
Undefined
R/W
*1
76
5
4
3
2
1
0
P06
P07
P05
P04
P03
P02
P01
P00
76
5
4
3
2
1
0
P16
P17
P15
P14
P13
P12
P11
P10
76
5
4
3
2
1
0
P26
P27
P25
P24
P23
P22
P21
P20
P36
P37
P35
P34
P33
P32
P31
P30
76
5
4
3
2
1
0
76
5
4
3
2
1
0
P46
P47
P45
P44
P43
P42
P41
P40
P56
P57
P55
P54
P53
P52
P51
P50
76
5
4
3
2
1
0
76
5
4
3
2
1
0
P66
P67
P65
P64
P63
P62
P61
P60
P76
P77
P75
P74
P73
P72
P71
P70
76
5
4
3
2
1
0
76
5
4
3
2
1
0
P86
P87
P85
P84
P83
P82
P81
P80
P96
P97
P95
P94
P93
P92
P91
P90
76
5
4
3
2
1
0
76
5
4
3
2
1
0
PA3
PA2
PA1
PA0
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