Datasheet

71M6513/71M6513H
3-Phase Energy Meter IC
DATA SHEET
SEPTEMBER 2011
© 2005-2011 Teridian Semiconductor Corporation Page: 85 of 104
A Maxim Integrated Products Brand
Figure 34: LCD Boost Circuit
Connecting I2C EEPROMs
I2C EEPROMs or other I2C compatible devices should be connected to the DIO pins DIO4 and DIO5, as shown in Figure 35.
Pull-up resistors of roughly 3kΩ to V3P3 should be used for both SCL and SDA signals. The DIO_EEX register in I/O RAM
must be set to 1 in order to convert the DIO pins DIO4 and DIO5 to I2C pins SCL and SDA.
Figure 35: EEPROM Connection
Connecting 5V Devices
In general, all pins of the 71M6513 are compatible with external 5V devices. The exceptions are the power supply pins and the
RX pin of the UART (see section Electrical Specifications).
LCD_BSTEN
segments
71M6513
5V LCD
commons
VLCD
V3P3
5VDC
VDRV
V3P3
LCD_FS
LCD_EN
LCD_MODE
Contrast
ON/OFF
LCD type
LCD_BSTEN
segments
71M6513
5V LCD
commons
VLCD
V3P3
5VDC
VDRV
V3P3
LCD_FS
LCD_EN
LCD_MODE
Contrast
ON/OFF
LCD type
DIO4
DIO5
71M6513
EEPROM
SCL
SDA
V3P3
3kΩ
3kΩ
DIO4
DIO5
71M6513
EEPROM
SCL
SDA
V3P3
3kΩ
3kΩ