参数资料
型号: 71M6541F-DB
厂商: Maxim Integrated Products
文件页数: 61/166页
文件大小: 0K
描述: DEMO BOARD 71M6541F
标准包装: 1
系列: *
71M6541D/F/G and 71M6542F/G Data Sheet
2.5.8.2 Digital I/O for the 71M6541D/F/G
A total of 32 combined SEG/DIO pins plus 5 SEG outputs are available for the 71M6541D/F/G. These
pins can be categorized as follows:
17 combined SEG/DIO segment pins:
o
o
o
o
SEGDIO4…SEGDIO5 (2 pins)
SEGDIO9…SEGDIO14 (6 pins)
SEGDIO19…SEGDIO25 (7 pins)
SEGDIO44…SEGDIO45 (2 pins)
15 combined SEG/DIO segment pins shared with other functions:
o
o
o
o
o
o
o
SEGDIO0/WPULSE, SEGDIO1/VPULSE (2 pins)
SEGDIO2/SDCK, SEGDIO3/SDATA (2 pins)
SEGDIO6/XPULSE, SEGDIO7/YPULSE (2 pins)
SEGDIO8/DI (1 pin)
SEGDIO26/COM5, SEGDIO27/COM4 (2 pins)
SEGDIO36/SPI_CSZ…SEGDIO39/SPI_CKI (4 pins)
SEGDIO51/OPT_TX, SEGDIO55/OPT_RX (2 pins)
5 dedicated SEG segment pins are available:
o
o
ICE Inteface pins: SEG48/E_RXTX, SEG49/E_TCLK, SEG50/E_RST (3 pins)
Test Port pins: SEG46/TMUX2OUT, SEG47/TMUXOUT (2 pins)
There are four dedicated common segment outputs (COM0…COM3) plus the two additional shared common
segment outputs that are listed under combined SEG/DIO shared pins (SEGDIO26/COM5,
SEGDIO27/COM4).
Thus, in a configuration where none of these pins are used as DIOs, there can be up to 37 LCD segment
pins with 4 commons, or 35 LCD segment pins with 6 commons. And in a configuration where LCD
segment pins are not used, there can be up to 32 DIO pins.
The configuration for pins SEGDIO19 to SEGDIO27 is shown in Table 49 , and the configuration for pins
SEGDIO36-39 and SEGDIO44-45 is shown in Table 50 . SEG46 to SEG50 cannot be configured for DIO.
The configuration for pins SEGDIO51 and SEGDIO55 is shown in Table 51 .
Table 48: Data/Direction Registers for SEGDIO0 to SEGDIO14 (71M6541D/F/G)
SEGDIO
Pin #
Configuration:
0
31
0
1
30
1
2
29
2
3
28
3
4
27
4
5
26
5
6
25
6
7
24
7
8
23
0
9
22
1
10
21
2
11
20
3
12
19
4
13
18
5
14
17
6
15
0 = DIO, 1 = LCD
LCD_MAP[7:0] (I/O RAM 0x240B)
LCD_MAP[14:8] (I/O RAM 0x240A)
SEG Data Register
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14
LCD_SEG0[5:0] to LCD_SEG14[5:0] (I/O RAM 0x2410[5:0] to 0x241E[5:0]
DIO Data Register
0
1 2
P0 ( SFR 0x80 )
3
0
1 2
P1 ( SFR 0x90 )
3
0
1 2
P2 ( SFR 0xA0 )
3
0
1 2
P3 ( SFR 0xB0 )
Direction Register:
4
5
6
7
4
5
6
7
4
5
6
7
4
5
6
0 = input, 1 = output
P0 ( SFR 0x80 )
P1 ( SFR 0x90 )
P2 ( SFR 0xA0 )
P3 ( SFR 0xB0 )
Internal Resources
Configurable
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
(see Table 47 )
Rev 4
61
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