ST2202 datasheet(49/65 Pages) ETC

49 / 65 page

Sitronix

ST2202

Ver 2.0a

49/65

2003-May-05

17.3.3 SPI Status Register

TABLE 17-5 SPI Status Register

Address Name

R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default

RXRDY

TXEMP

SBZ

MDERR

OERR

BCERR

-000 -000

$053

SSR

Write any value to reset SSR

Bit 6: RXRDY : Receive buffer status flag

0 = Receive buffer is empty

1 = Receive buffer is filled with new data and is ready

Bit 5: TXEMP : Transmit buffer status flag

0 = Data in transmit buffer is waiting for exchanging

1 = Transmit buffer is empty

Bit 4: SBZ : SPI busy flag

0 = SPI is idle

1 = SPI is busy exchanging data

Bit 2: MDERR : Mode fault status flag

0 = SS signal is at high level and is normal

1 = SS signal inputs low level / a mode fault status detected

Bit 1: OERR : Receive buffer overrun error flag

0 = No receive buffer overrun error

1 = Receive buffer overrun error occurs

Bit 0: BERR : Bit count violation flag

0 = Exchanged data bit number matches bit count setting in slave mode

1 = Exchanged data bit number is less than bit count setting in slave mode

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