AS3953B datasheet(37/65 Pages) AMSOSRAM

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[v1-04] 2016-Jan-07

AS3953B − Application Information

Loading Transmitting Data into FIFO

Loading the transmitting data into the FIFO is similar to writing

data into an addressable registers. Difference is that in case of

loading more bytes all bytes go to the FIFO. The command mode

code 10 indicates FIFO operations. In case of loading

transmitting data into FIFO all bits <C5 – C0> are set to ‘0’. Then

a bit-stream, the data to be sent (1 to 32 bytes), can be

transferred.

Figure 46 shows how to load the transmitting data into the FIFO.

Figure 46:

Loading of FIFO

Reading Received Data from FIFO

Reading received data from the FIFO is similar to reading data

from an addressable registers. Difference is that in case of

reading more bytes they all come from the FIFO. The command

mode code 10 indicates FIFO operations. In case of reading the

received data from the FIFO all bits <C5 – C0> are set to ‘1’. On

the following SCLK rising edges the data from FIFO appears as

in case of read data from addressable registers. In case the

command is terminated by putting /SS high before a packet of

8 bits composing one byte is read that particular byte is

considered read.

/SS

SCLK

MOSI

1 to 32

bytes

SCLK rising

edge Data is

transfered

from µC

SCLK falling

edge Data is

sampled

/SS rising edge

signals end of

COMMAND Mode

10 pattern

indicates FIFO

mode

Start of

payload Data

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