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71M6534 Datasheet(PDF) 43 Page - Maxim Integrated Products

Part No. 71M6534
Description  Exceeds IEC 62053/ANSI C12.20 Standards
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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71M6534 Datasheet(HTML) 43 Page - Maxim Integrated Products

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FDS_6533_6534_004
71M6533/G/H and 71M6534/H Data Sheet
Rev 2
43
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 39 through
Table 42 shows all the DIO pins with their configuration, direction control and data registers. Table
entries marked with an asterisk and grayed are applicable to the 71M6534 only.
Table 39: Data/Direction Registers and Internal Resources for DIO 1-15
DIO
PB
1
2
3
4
5
6
7
8
9
10 11 12* 13 14 15
LCD Segment
24 25 26 27 28 29 30 31 32* 33 34 35
71M6533 Pin #
97 91
3
17 60 61 62 63 67 68 69 70
44 29 30
71M6534 Pin #
114 109 3 22 70 71 72 73 77 78 79 80 120 50 35 36
Configuration (DIO
or LCD segment)
Always DIO
0
1
2
3
4
5
6
7
0* 1
2
3
LCD_BITMAP[31:24]
LCD_BITMAP[39:32]
Data Register
0
1
2
3
4
5
6
7
0
1
2
3
4*
5
6
7
DIO0 = P0 (SFR 0x80)
DIO1 = P1 (SFR 0x90)
Direction Register
0 = input, 1 = output
1
2
3
4
5
6
7
0
1
2
3
4*
5
6
7
DIO_DIR0 (SFR 0xA2)
DIO_DIR1 (SFR 0x91)
Internal Resources
Configurable
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Table 40: Data/Direction Registers and Internal Resources for DIO 16-30
DIO
16 17 18 19 20 21 22* 23 24 25 26 27 28* 29 30
LCD Segment
36 37 38 39 40 41 42* 43 44 45 46 47 48* 49 50
71M6533 Pin #
33 12 13 64 65 66
54 46 43 42 41
32 35
71M6534 Pin #
39 17 18 74 75 76 115 64 52 49 48 47 81 38 41
Configuration (DIO
or LCD segment)
4
5
6
7
0
1
2*
3
4
5
6
7
0*
1
2
LCD_BITMAP[39:32]
LCD_BITMAP[47:40]
LCD_BITMAP[55:48]
Data Register
0
1
2
3
4
5
6*
7
0
1
2
3
4*
5
6
DIO2 = P2 (SFR 0xA0)
DIO3 = P3 (SFR 0xB0)
Direction Register
0 = input, 1 = output
0
1
2
3
4
5
6*
7
DIO_DIR2 (SFR 0xA1)


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