5812-DS01-R datasheet(81/84 Pages) BOARDCOM

81 / 84 page

Advance Data Sheet

BCM5812

3/11/03

B roa dcom Co rpo rat ion

Document

5812-DS01-405-R

Description

Page 73

Appendix C: EEPROM Information

DESCRIPTION

The BCM5812 optional serial EEPROM should be an industry standard type 93C46. The part should be configured for 16-

bit operation and connected as shown in Figure 43. The EEPROM must be externally programmed, as the BCM5812 does

not support write or erase cycles.

Figure 43: EEPROM Connection

PROGRAMMING

Table 32 shows the EEPROM locations accessed by the BCM5812 and what information should be programmed into each.

For reference, the equivalent default value for that location, which the BCM5812 supplies if no EEPROM is present, is also

listed. All other locations should be programmed to 0xFF.

Although the BCM5812 makes 16-bit accesses, the EEPROM contents are shown in Table 32 with their respective byte

offset, as though for byte programming.

BCM5823

93C46

ORG

EEPROM_CS

EEPROM_DI

EEPROM_DO

EEPROM_SK

EEPROM#

VCC

BCM5823

93C46

ORG

EEPROM_CS

EEPROM_DI

EEPROM_DO

EEPROM_SK

EEPROM#

VCC

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