71M6543F-IGT/F Maxim Integrated Products, 71M6543F-IGT/F Datasheet - Page 62

• Manufacturer Part Number: 71M6543F-IGT/F
• Description: PMIC Solutions Precision Energy Meter IC
• Manufacturer: Maxim Integrated Products
• Type: Metering SoCr

Specifications of 71M6543F-IGT/F

• Core: 8051
• Core Architecture: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 5 KB
• Device Million Instructions Per Second: 5 MIPS
• Interface Type: I2C, ICE, SPI, UART
• Maximum Clock Frequency: 5 MHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Programmable I/os: 51
• Number Of Timers: 2
• On-chip Adc: 22 bit
• Operating Supply Voltage: 3 V to 3.6 V
• Package / Case: LQFP-100
• Processor Series: 8051
• Program Memory Size: 64 KB
• Program Memory Type: Flash
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

71M6543F/H and 71M6543G/GH Data Sheet
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.
LCD_VMODE[1:0] configurations.
62
DIO Data Register
Direction Register:
0 = input, 1 = output
© 2008–2011 Teridian Semiconductor Corporation
51
51
LCD_SEGDIO51[5:0] to LCD_SEGDIO55[5:0]
LCD_SEGDIO51[0] to LCD_SEGDIO55[0]
LCD_SEGDIO51[1] to LCD_SEGDIO55[1]
52
52
(I/O RAM 0x2443[5:0] to 0x2447[5:0])
(I/O RAM 0x2443[0] to 0x2447[0])
(I/O RAM 0x2443[1] to 0x2447[1])
53
53
54
54
55
55
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Table 52
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details the
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v1.2