L9230

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SPI Communication

Figure 9. Reading access / 8 bit

SPI Instruction

The uppermost 2 bit of the instruction byte contains the chipadress. The individual chipadress is a mask-option

and must be defined in accordance to the SPI-Members sharing on SS line.

SPI Instruction-Format

SPI Instruction-Bytes

MSB

76

543210

0

0

INSTR4

INSTR3

INSTR2

INSTR1

INSR0

INSW

Bit

Name

Description

7,6

CPAD1,0

Chip Adress (has to be ‘0’, ‘0’)

5-1

INSTR (4-0)

SPI instruction (encoding)

0

INSW

Don‘t care

SPI Instruction

Encoding

Description

bit 7,6

CPAD1,0

bit 5,4,3,2,1

INSTR(4...0)

Bit 0

RD_IDENT

00

00000

0

read identifier

RD_VERSION

00

00001

1

read version

RD_DIA

00

00100

1

read DIA_REG

all others

no function

SPI INSTRUCTION

MSB

XXXX XXXX

SS

SI

VERIFICATION BYTE

MSB

DATA/8 BIT

MSB

SO

D01AT480