Datasheet

71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
NOVEMBER 2010
Page: 62 of 98 © 2005–2010 Teridian Semiconductor Corporation V2.7
A Maxim Integrated Products Brand
LCD_MODE[2:0
]
2021[4:2] 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
LCD_NUM[4:0] 2020[4:0] 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
1-4 None DIO4-11, DIO14-17
5 SEG37 DIO4-11, DIO14-16
6 SEG36-37 DIO4-11, DIO14-15
7 SEG35-37 DIO4-11, DIO14
8-10 SEG34-37 DIO4-11
11 SEG34-37, SEG31 DIO4-10
12 SEG34-37, SEG30-31 DIO4-9
13 SEG34-37, SEG29-31 DIO4-8
14 SEG34-37, SEG28-31 DIO4-7
15 SEG34-37, SEG27-31 DIO4-6
16 SEG34-37, SEG26-31 DIO4-5
17 SEG34-37, SEG25-31 DIO4
18 SEG34-37, SEG24-31 None
LCD_SEG0[3:0]-
LCD_SEG19[3:0],
LCD_SEG24[3:0]-
LCD_SEG31[3:0],
LCD_SEG34[3:0]-
LCD_SEG37[3:0],
2030[3:0]
-
2043[3:0]
,
2048[3:0]
-
204f[3:0],
2052[3:0]
-
2055[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.
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/2
7
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] R/ MUX_SYNC enable. When high, converts SEG7 into a MUX_SYNC