71M6542F-IGT/F Maxim Integrated Products, 71M6542F-IGT/F Datasheet - Page 68

• Manufacturer Part Number: 71M6542F-IGT/F
• Description: PMIC Solutions Precision Energy Meter IC
• Manufacturer: Maxim Integrated Products
• Type: Metering SoCr

Specifications of 71M6542F-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

down. This can be used to reduce current in LCD mode.
The LCD bias may be compensated for temperature using the LCD_DAC[4:0] field (I/O RAM 0x240D[4:0]).
The bias may be adjusted from 1.4 V below the 3.3 V supply (V3P3SYS in MSN mode and VBAT in BRN
and LCD modes). When the LCD_DAC[4:0] field is set to 000, the DAC is bypassed and powered
68
STATIC (LCD_MODE=100)
1/3 BIAS, 3 STATES (LCD_MODE = 011 )
SEG_OFF
SEG_OFF
SEG_ON
SEG_ON
COM0
COM1
COM2
COM3
COM4
COM5
COM0
COM1
COM2
COM3
COM4
COM5
0
(1/2)
(1/2)
(1/2)
(1/2)
(1/2)
1
2
(2/3)
(1/3)
© 2008–2011 Teridian Semiconductor Corporation
1/2 BIAS, 2 STATES (LCD_MODE = 010 )
1/3 BIAS, 4 STATES (LCD_MODE = 000 )
SEG_OFF
SEG_OFF
Figure 21: LCD Waveforms
SEG_ON
SEG_ON
COM0
COM1
COM2
COM3
COM4
COM5
COM0
COM1
COM2
COM3
COM4
COM5
T
0
0
1
1
(1/2)
(1/2)
(1/2)
(1/2)
2
3
1/2 BIAS, 3 STATES (LCD_MODE = 011 )
SEG_OFF
SEG_OFF
SEG_ON
SEG_ON
1/3 BIAS, 6 STATES (LCD_MODE = 110 )
COM0
COM1
COM2
COM3
COM4
COM5
COM0
COM1
COM2
COM3
COM4
COM5
0
0
1
1
2
2
(1/2)
(1/2)
(1/2)
3
4
5
v1.1