AS3911 datasheet(43/159 Pages) AMSCO

tên linh kiện	AS3911

Giải thích chi tiết về linh kiện	NFC Initiator / HF Reader IC

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ams Datasheet

Page 43

[v2-11] 2016-Jun-13

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AS3911 − 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. SPI operation mode

bits 10 indicate 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 96 bytes), can be transferred. In case

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

of 8 bits composing one byte is sent, writing of that particular

byte in FIFO is not performed.

Figure 29 shows how to load the Transmitting Data into the

FIFO.

Figure 29:

SPI Communication: Loading of FIFO

1 to 96

bytes

SCLK rising

edge Data is

transfered

from µC

SCLK falling

edge Data is

sampled

10 pattern

indicates

FIFO mode

Start of payload

Data

/SS

SCLK

MOSI

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