71M6543F datasheet(62/157 Pages) MAXIM

Part #	71M6543F

Description	Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation

PDF	157 Pages

Scroll/Zoom	100%

Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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71M6543F/H and 71M6543G/GH Data Sheet

v1.2

LCD_SEGDIO51[5:0] to LCD_SEGDIO55[5:0]

(I/O RAM 0x2443[5:0] to 0x2447[5:0])

DIO Data Register

–

LCD_SEGDIO51[0] to LCD_SEGDIO55[0]

(I/O RAM 0x2443[0] to 0x2447[0])

Direction Register:

0 = input, 1 = output

–

LCD_SEGDIO51[1] to LCD_SEGDIO55[1]

(I/O RAM 0x2443[1] to 0x2447[1])

2.5.10.3 LCD Drivers

The LCD drivers are grouped into up to six commons (COM0 – COM5) and up to 56 segment drivers.

The LCD interface is flexible and can drive 7-segment digits, 14-segment digits or enunciator symbols.

A voltage doubler and a contrast DAC generate VLCD from either VBAT or V3P3SYS, depending on the

V3P3SYS voltage. The voltage doubler,

while capable of driving into a 500 kΩ load, is able to generate a

maximum LCD voltage that is within 1 V of twice the supply voltage. The doubler and DAC operate from

a trimmed low-power reference.

The configuration of the VLCD generation is controlled by the I/O RAM field LCD_VMODE[1:0] (I/O RAM

0x2401[7:6]). It is decoded into LCD_EXT, LDAC_E, and LCD_BSTE. Table 52 details the

LCD_VMODE[1:0] configurations.

71M6543F Datasheet(PDF) 62 Page - Maxim Integrated Products