CS5376-BS 데이터 시트보기 (PDF) - Cirrus Logic

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CS5376-BS

Low Power Multi-Channel Decimation Filter

Cirrus Logic 

CS5376

SPI 1 Read from EEPROM

SSI

MOSI

READ

CMD

0x03

2 BYTE

ADDR

ADDR ADDR

MISO

CS11

DATA1 DATA2 DATA3

1 BYTE / 3 BYTE

DATA

Cycle

1

2

3

4

5

6

7

8

SCK1

MOSI

MSB 6

5

4

3

2

1

LSB

MISO

MSB

6

5

4

3

2

1

LSB X

CS11

Figure 13. SPI 1 Master Mode Transactions

coefficients specified by prior EEPROM com-

mands.

5.2.3 CS5376 to EEPROM Transactions

When reading data from EEPROM in stand-alone

boot mode, the SPI 1 port operates as a bus master.

Two types of serial transactions are generated by

the CS5376, command reads and data reads. Com-

mand reads are 4-byte serial transactions to read a

command byte, and data reads are 6-byte serial

transactions to read a data word. Master mode

CS5376 to EEPROM transaction timing is shown

in Figure 13.

Command Read Transactions

A CS5376 to EEPROM command read transaction

reads a 1-byte command from EEPROM memory.

It requires a 4-byte serial transaction to complete: a

1-byte SPI ‘read’ opcode (0x03), a 2-byte EE-

PROM address, and the returned 1-byte command

value. Based on the returned command value, the

DS256PP1

26

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