71m6521fe Maxim Integrated Products, Inc., 71m6521fe Datasheet - Page 65

• Manufacturer Part Number: 71m6521fe
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

I
Pull-up resistors of roughly 10kΩ to V3P3D (to ensure operation in BROWNOUT mode) should be used for both SCL and SDA
signals. The DIO_EEX register in I/O RAM must be set to 01 in order to convert the DIO pins DIO4 and DIO5 to I
and SDA
v1.0
2
C EEPROMs or other I
Note: LCD segment numbers are given without CKTEST/SEG19, E_RXTX/SEG38, E_TCLK/SEG33, and E_RST/SEG32.
LCD_NUM
10
11
12
13
14
15
16
17
18
0
1
2
3
4
5
6
7
8
9
Table 63: LCD and DIO Pin Assignment by LCD_NUM for the LQFP-64 Package
SEG in Addition
to SEG0-SEG18
2
30-31, 34-37
29-31, 34-37
28-31, 34-37
27-31, 34-37
26-31, 34-37
25-31, 34-37
24-31, 34-37
C compatible devices should be connected to the DIO pins DIO4 and DIO5, as shown in Figure 33.
31, 34-37
36-37
35-37
34-37
34-37
34-37
37
-
-
-
-
-
© 2005-2008 TERIDIAN Semiconductor Corporation
.
Figure 33: I
Total Number of LCD
cluding SEG0-SEG18
71M6521
71M6521
Connecting I
Segment Pins In-
DIO4
DIO4
DIO5
DIO5
31
19
19
19
19
19
20
21
22
23
23
23
24
25
26
27
28
29
30
2
C EEPROM Connection
10kΩ
10kΩ
2
C EEPROMs
71M6521DE/71M6521FE
DIO Pins in Addition
10kΩ
10kΩ
EEPROM
EEPROM
to DIO1-DIO2
SCL
SCL
4-11, 14-17
4-11, 14-17
4-11, 14-17
4-11, 14-17
4-11, 14-17
4-11, 14-16
4-11, 14-15
SDA
SDA
V3P3D
V3P3D
4-11, 14
None
4-11
4-11
4-11
4-10
4-9
4-8
4-7
4-6
4-5
4
Energy Meter IC
Total Number of DIO
Pins Including DIO1,
DATASHEET
DIO2
14
14
14
14
14
13
12
11
10
10
10
9
8
7
6
5
4
3
2
JANUARY 2008
Page: 65 of 101
2
C pins SCL