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71M6534 Datasheet(PDF) 88 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) 88 Page - Maxim Integrated Products

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71M6533/G/H and 71M6534/H Data Sheet
FDS_6533_6534_004
88
Rev 2
LCD_BITMAP
[63:61],
[59:56]
2027[7:5,3:0]
0
L
R/W
Configuration for DIO43/SEG63 through DIO41/SEG61 and DIO39/SEG59 through
DIO36/SEG56. LCD_BITMAP[62], corresponding to DIO42/SEG62, and
LCD_BITMAP[59:56] ,corresponding to DIO39/SEG59 through DIO36/SEG56, are only
applicable to the 71M6534. Unused bits should be set to zero.
1 = LCD pin, 0 = DIO pin.
LCD_BITMAP
[71:64]
2028[7:0]
0
L
R/W
Configuration for DIO51/SEG71 through DIO44/SEG64. LCD_BITMAP[66],
corresponding to DIO46/SEG66, is only applicable to the 71M6534. Unused bits should
be set to zero.
1 = LCD pin, 0 = DIO pin.
LCD_BLKMAP18
[3:0]
205A[3:0]
0
L
R/W Identifies which segments connected to SEG18 should blink. 1 means blink. The
most significant bit corresponds to COM3, the least significant bit to COM0.
LCD_CLK[1:0]
2021[1:0]
0
L
R/W
Sets the LCD clock frequency for the COM/SEG pins (not the frame rate) according to
the following (fw = 32768 Hz):
00 = fw/512, 01 = fw/256, 10 = fw/128, 11 = fw/64
LCD_DAC[2:0]
20AB[3:1]
0
L
R/W
LCD contrast control DAC. Adjusts the LCD voltage in steps of 0.2 V from V3P3SYS
(mission mode) or VBAT (BROWNOUT/LCD modes).
LCD_DAC[2:0]
Resulting LCD Voltage
000
V3P3 or VBAT
001
V3P3 or VBAT – 0.2 V
010
V3P3 or VBAT – 0.4 V
011
V3P3 or VBAT – 0.6 V
100
V3P3 or VBAT – 0.8 V
101
V3P3 or VBAT – 1.0 V
110
V3P3 or VBAT – 1.2 V
111
V3P3 or VBAT – 1.4 V
LCD_E
2021[5]
0
L
R/W Enables the LCD display. When disabled, VLC2, VLC1 and VLC0 are ground as are
the COM and SEG outputs.
LCD_MODE[2:0] 2021[4:2]
0
L
R/W
The LCD bias mode. Use the LCD DAC to reduce saturation. The number of states is
the number of commons which are driven to multiplex the LCD.
LCD_MODE[2:0]
Function
Notes
000
4 states, ⅓ bias
⅓ bias modes can drive 3.3 V LCDs.
001
3 states, ⅓ bias
010
2 states, ½ bias
½ bias and static modes can drive
both 3.3 V and 5 V LCDs.
011
3 states, ½ bias
100
static display


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