71M6403
Electronic Trip Unit
SEPTEMBER 2006
LCD_NUM[4:0]
2020[4:0]
R/W Number of dual-purpose LCD/DIO pins to be configured as LCD. This
number can be between 0 and 18. The first dual-purpose pin to be
used as LCD is SEG41/DIO21. If LCD_NUM = 2, SEG41 and SEG 40
will be configured as LCD. The remaining SEG39 to SEG24 will be
configured as DIO19 to DIO4.
LCD_NUM
SEG
DIO
0
1
2
3
4
5
6
7
8
None
SEG41
DIO4-21
DIO4-20
DIO4-19
DIO4-18
DIO4-17
DIO4-16
DIO4-15
DIO4-14
DIO4-13
DIO4-12
DIO4-11
DIO4-10
DIO4-9
DIO4-8
DIO4-7
DIO4-6
DIO4-5
DIO4
SEG40-41
SEG39-41
SEG38-41
SEG37-41
SEG36-41
SEG35-41
SEG34-41
SEG33-41
SEG32-41
SEG31-41
SEG30-41
SEG29-41
SEG28-41
SEG27-41
SEG26-41
SEG25-41
SEG24-41
9
10
11
12
13
14
15
16
17
18
None
LCD_SEG0[3:0]
…
LCD_SEG41[3:0]
MPU_DIV[2:0]
2030[3:0]
…
2059[3:0]
2004[2:0]
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.
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 (I0-I5)
01 - 4 states (I0-I3)
10 - 3 states (I0-I2)
11 - 2 states (I0-I1)
MUX_E
2005[0]
R/W MUX_SYNC enable. When high, converts SEG7 into a MUX_SYNC
output.
Page: 55 of 75
© 2006 TERIDIAN Semiconductor Corporation
REV 1.0
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
