参数资料
型号: 71M6531D-IMR/F
厂商: Maxim Integrated
文件页数: 43/121页
文件大小: 0K
描述: IC ENERGY METER 128KB 68-QFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
系列: *
FDS 6531/6532 005
Data Sheet 71M6531D/F-71M6532D/F
1.5.8
Digital I/O – 71M6532D/F
o
o
o
o
o
o
The 71M6532D/F includes up to 43 pins of general-purpose digital I/O. These pins are compatible with 5 V
inputs (no current limiting resistors are needed). The Digital I/O pins can be categorized as follows:
? Dedicated DIO pins (4 pins):
DIO3
DIO56 – DIO58 (3 pins)
? DIO/LCD segment pins (a total of 37 pins):
DIO4/SEG24 – DIO27/SEG47 (24 pins)
DIO29/SEG49, DIO30/SEG50 (2 pins)
DIO40/SEG60 – DIO45/SEG65 (6 pins)
DIO47/SEG67 – DIO51/SEG71 (5 pins)
? DIO pins combined with other functions (2 pins): DIO2/OPT_TX, DIO1/OPT_RX
On reset or power-up, all DIO pins are inputs until they are configured for the desired direction under
MPU control. The pin function can be configured by the I/O RAM bits LCD_BITMAPn . Setting
LCD_BITMAPn = 1 configures the pin for LCD, setting LCD_BITMAPn = 0 configures it for DIO. Once a
pin is configured as DIO, it can be configured independently as an input or output with the DIO_DIR bits
or the LCD_SEGn registers. Input and output data are written to or read from the pins using SFR registers
P0, P1 , and P2 . Table 42 to Table 44 shows the DIO pins with their configuration, direction control and
data registers.
Table 42: Data/Direction Registers and Internal Resources for DIO 1-15 (71M6532D/F)
DIO
LCD Segment
Pin number
PB
92
1
87
2
3
3
17
4
24
60
5
25
61
6
26
62
7
27
63
8
28
67
9
29
68
10
30
69
11
31
70
12
32
100
13
33
44
14
34
29
15
35
30
Configuration (DIO
or LCD segment)
Always DIO
0
1
2 3 4 5
LCD_BITMAP[31:24]
6
7
0 1 2 3
LCD_BITMAP[39:32]
Data Register
Direction Register
0 = input,
1 = output
0
1
1
2 3 4 5
DIO0 = P0 (SFR 0x80 )
2 3 4 5
DIO_DIR0 (SFR 0xA2)
6
6
7
7
0
0
1
1
2 3 4 5
DIO1 = P1 (SFR 0x90 )
2 3 4 5
DIO_DIR1 (SFR 0x91)
6
6
7
7
Internal Resources
Configurable
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Table 43: Data/Direction Registers and Internal Resources for DIO 16-30 (71M6532D/F)
DIO
LCD Segment
Pin number
16
36
33
17
37
12
18
18
13
19
39
64
20
40
65
21
41
66
22
42
93
23
43
54
24
44
46
25
45
43
26
46
42
27
47
41
29
49
32
30
50
35
Configuration (DIO
or LCD segment)
4 5 6 7
LCD_BITMAP[39:32]
0
1
2 3 – –
LCD_BITMAP[47:40]
– 1 2 –
LCD_BITMAP[55:48               ]
Data Register
Direction Register
0 = input,
1 = output
0
1 2 3 4 5
DIO2 = P2 (SFR 0xA0)
1
3
4
5
DIO_DIR2 (SFR 0xA1)
6
7
0
1
2 3 – 5
DIO3 = P3 ( SFR 0xB0)
6
Rev 2
43
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