AS3953_07 datasheet(35/42 Pages) AMSCO

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AS3953

Datasheet - A pp l ic a t io n I n f or m a t i on

FIFO Status Register 1.

Note:

At power-up and after direct commands

Set Default and Clear content of this register is set to 0.

FIFO Status Register 2.

Note:

At power-up and after direct commands

Set Default and Clear content of this register is set to 0

Address# 0Ch : FIFO Status 1

Type: R

Bit

Name

Function

Comments

RFU

fifo_b5

Number of data bytes (binary coded) in the FIFO

which were not read out

Valid range is from 000000 to 100000

000000 means that there are no data bytes to

be read out

fifo_b4

fifo_b3

fifo_b2

fifo_b1

fifo_b0

Address# 0Dh : FIFO Status 2

Type: R

Bit

Name

Function

Comments

RFU

fifo_unf

FIFO underflow

Set when more bytes than the actual content

of FIFO are read

fifo_ovr

FIFO overflow

fifo_ncp

Last FIFO byte is not complete

fifo_lb2

Number of bits in last FIFO byte in case it was not

complete (fifo_npc=1)

MSB bits valid

fifo_lb1

fifo_lb0

np_lb

Parity bit is missing in last byte

This is a framing error

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