Datasheet

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71M6521DE/DH/FE Data Sheet

Page: 68 of 107 Rev 3

LCD_NUM

SEG in Addition

to SEG0-SEG18

Total Number of LCD

Segment Pins In-

cluding SEG0-SEG18

DIO Pins in Addition

to DIO1-DIO2

Total Number of DIO

Pins Including DIO1,

DIO2

0 - 19 4-11, 14-17 14

1 - 19 4-11, 14-17 14

2 - 19 4-11, 14-17 14

3 - 19 4-11, 14-17 14

4 - 19 4-11, 14-17 14

5 37 20 4-11, 14-16 13

6 36-37 21 4-11, 14-15 12

7 35-37 22 4-11, 14 11

8 34-37 23 4-11 10

9 34-37 23 4-11 10

10 34-37 23 4-11 10

11 31, 34-37 24 4-10 9

12 30-31, 34-37 25 4-9 8

13 29-31, 34-37 26 4-8 7

14 28-31, 34-37 27 4-7 6

15 27-31, 34-37 28 4-6 5

16 26-31, 34-37 29 4-5 4

17 25-31, 34-37 30 4 3

18 24-31, 34-37 31 None 2

Note: LCD segment numbers are given without CKTEST/SEG19, E_RXTX/SEG38, E_TCLK/SEG33, and

E_RST/SEG32.

Table 65: LCD and DIO Pin Assignment by LCD_NUM for the LQFP-64 Package

Connecting I

C EEPROMs

C EEPROMs or other I

C compatible devices should be connected to the DIO pins DIO4 and DIO5, as shown in

Figure 35. 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

C pins SCL and SDA

Figure 35: I

C EEPROM Connection

DIO4

DIO5

71M6521

EEPROM

SCL

SDA

V3P3D

10kΩ