71M6531F-IM/F Maxim Integrated Products, 71M6531F-IM/F Datasheet - Page 82

• Manufacturer Part Number: 71M6531F-IM/F
• Description: IC ENERGY METER 256KB 68-QFN
• Manufacturer: Maxim Integrated Products

Specifications of 71M6531F-IM/F

• Mounting Style: SMD/SMT
• Package / Case: QFN-68
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Data Sheet 71M6531D/F-71M6532D/F
82
LCD_DAC[2:0]
LCD_E
LCD_MODE[2:0] 2021[4:2]
LCD_ONLY
LCD_SEG0[3:0]
…
LCD_SEG19[3:0]
LCD_SEG24[3:0]
…
LCD_SEG31[3:0]
LCD_SEG32[3:0] 2050[3:0]
Name
20AB[3:1]
2021[5]
20A9[5]
2030[3:0]
…
2043[3:0]
2048[3:0]
…
204F[3:0]
Location
Reset
…
…
0
0
0
0
0
0
0
0
0
Wake
…
…
L
L
L
0
L
L
L
L
L
© 2005-2010 TERIDIAN Semiconductor Corporation
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Dir
W
…
…
LCD contrast control DAC. Adjusts the LCD voltage in steps of 0.2 V from V3P3SYS
(mission mode) or VBAT (brownout/LCD modes).
Enables the LCD display. When disabled, VLC2, VLC1 and VLC0 are ground as are
the COM and SEG outputs.
The LCD bias mode. Use the LCD DAC in ANACTRL to reduce saturation. The number
of states is the number of commons which are driven to multiplex the LCD.
Puts the part to sleep, but with the LCD display still active. LCD_ONLY is ignored if
system power is present. While in SLEEP mode, the device will wake up on reset,
when the autowake timer times out, when the push button is pushed, or when system
power returns.
LCD Segment Data. Each word contains information for 1 to 4 time divisions of each
segment. Some addresses are used to address two segments.
In each word, bit 0 corresponds to COM0, bit 1 to COM1, bit 2 to COM2 and bit 3 to
COM3 of the first segment. Bits 4 through 7 correspond to COM0 to COM3, respec-
tively, of the second segment.
Care should be taken when writing to LCD_SEG locations since some of them control
DIO pins.
LCD_DAC[2:0]
LCD_MODE[2:0]
000
001
010
011
100
101
110
111
000
001
010
011
100
Resulting LCD Voltage
V3P3 or VBAT
V3P3 or VBAT – 0.2V
V3P3 or VBAT – 0.4V
V3P3 or VBAT – 0.6V
V3P3 or VBAT – 0.8V
V3P3 or VBAT – 1.0V
V3P3 or VBAT – 1.2V
V3P3 or VBAT – 1.4V
Function
4 states, ⅓ bias
3 states, ⅓ bias
2 states, ½ bias
3 states, ½ bias
static display
Description
Notes
⅓ bias modes can drive 3.3 V LCDs.
½ bias and static modes can drive
both 3.3 V and 5 V LCDs.
FDS 6531/6532 005
v1.3