71M6533/71M6534 Data Sheet
FDS_6533_6534_004
The following dedicated and multi-use pins can be assigned as LCD segments:
•
•
15 dedicated LCD segment pins: SEG0 to SEG2, SEG8, SEG12 to SEG18, SEG20 to SEG23.
9 dual-function pins: MUX_SYNC/SEG7, CKTEST/SEG19, E_RXTX/SEG9, E_TCLK/SEG10,
E_RST/SEG11, SEG3/PCLK, SEG4/PSDO, SEG5/PCSZ, SEG6/PSDI.
•
•
5 additional dual-function pins in the 71M6534: SEG51/E_TBUS0, SEG52/E_TBUS1,
SEG53/E_TBUS2, SEG54/E_TBUS3, SEG55/E_ISYNC
33 (71M6533) or 46 (71M6534) combined DIO and segment pins
o
71M6533: SEG24/DIO4 to SEG31/DIO11, SEG33/DIO13 to SEG41/DIO21, SEG43/DIO23 to
SEG47/DIO27, SEG49/DIO29, SEG50/DIO30, SEG61/DIO41, SEG63/DIO43 to
SEG65/DIO45, and SEG67/DIO47 to SEG71/DIO51.
o
71M6534: SEG24/DIO4 to SEG50/DIO30, SEG56/DIO36 to SEG59/DIO39, SEG61/DIO41 to
SEG75/DIO55.
71M6533/71M6534
LCD
segments
commons
Figure 33: Connecting LCDs
3.7 Connecting I2C EEPROMs
I2C EEPROMs or other I2C compatible devices should be connected to the DIO pins DIO4 and DIO5, as
shown in Figure 34.
Pull-up resistors of roughly 10 kΩ 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 I2C pins SCL and SDA.
V3P3D
10 kΩ
10 kΩ
EEPROM
DIO4
DIO5
SCL
SDA
71M6533/71M6534
Figure 34: I2C EEPROM Connection
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© 2007-2009 TERIDIAN Semiconductor Corporation
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