71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
AUGUST 2007
LCD_MODE[2:0]
LCD_NUM[4:0]
2021[4:2]
2020[4:0]
R/W The LCD bias mode.
000: 4 states, 1/3 bias
001: 3 states, 1/3 bias
010: 2 states, ½ bias
011: 3 states, ½ bias
100: static display
R/W
Controls the number of dual-purpose LCD/DIO pins to be configured
as LCD. LCD_NUM will be between 0 and 18. The first dual-purpose
pin to be allocated as LCD is SEG37/DIO17. The table below lists
which SEG and DIO functions are selected for each LCD_NUM value.
LCD_NUM
SEG
DIO
DIO4-11, DIO14-17
DIO4-11, DIO14-16
DIO4-11, DIO14-15
DIO4-11, DIO14
DIO4-11
DIO4-10
DIO4-9
DIO4-8
DIO4-7
1-4
5
6
None
SEG37
SEG36-37
SEG35-37
SEG34-37
7
8-10
11
12
13
14
15
16
17
18
SEG34-37, SEG31
SEG34-37, SEG30-31
SEG34-37, SEG29-31
SEG34-37, SEG28-31
SEG34-37, SEG27-31
SEG34-37, SEG26-31
SEG34-37, SEG25-31
SEG34-37, SEG24-31
DIO4-6
DIO4-5
DIO4
None
LCD_SEG0[3:0]-
LCD_SEG19[3:0],
2030[3:0]-
2043[3:0],
R/W LCD Segment Data. Each word contains information for from 1 to 4
time divisions of each segment. In each word, bit 0 corresponds to
COM0, on up to bit 3 for COM3.
LCD_SEG24[3:0]-
LCD_SEG31[3:0],
2048[3:0]-
204f[3:0],
LCD_SEG34[3:0]-
LCD_SEG37[3:0],
2052[3:0]-
2055[3:0]
MPU_DIV[2:0]
2004[2:0]
R/W The MPU clock divider (from CKCE). These bits may be programmed
by the MPU without risk of losing control.
000 - CKCE, 001 - CKCE/2, …, 111 - CKCE/27
MPU_DIV is 000 on power-up.
MUX_ALT
2005[2]
R/W The MPU asserts this bit when it wishes the MUX to perform ADC
conversions on an alternate set of inputs.
MUX_DIV[1:0]
2002[7:6]
R/W The number of states in the input multiplexer.
00 - 6 states 01 - 4 states 10 - 3 states 11 - 2 states
MUX_E
2005[0]
2008[5]
R/W MUX_SYNC enable. When high, converts SEG7 into a MUX_SYNC
output.
R/W Tristates the OPT_TX output.
OPT_TXDIS
Page: 61 of 95
© 2005-2007 TERIDIAN Semiconductor Corporation
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