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MAX17841B Datasheet(PDF) 21 Page - Maxim Integrated Products

No. de pieza MAX17841B
Descripción Electrónicos  Automotive SPI Communication Interface (ASCI)
PDF  33 Pages
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Fabricante Electrónico  MAXIM [Maxim Integrated Products]
Página de inicio  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX17841B Datasheet(HTML) 21 Page - Maxim Integrated Products

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Table 11. Transaction Sequence for UART Write and Read
SPI DIN
SPI DOUT
DESCRIPTION
TRANSACTION 1
LoadtheWRITEALLcommandsequenceintotheloadqueue
C0h
xxh
WR_LD_QSPIcommandbyte
06h
xxh
Message length = 6
02h
xxh
WRITEALLcommandbyte
12h
xxh
Register address of the device
B1h
xxh
LSbyteofregisterdatatobewritten
B2h
xxh
MS byte of register data to be written
C4h
xxh
PECbytefor02h,12h,B1h,B2h
00h
xxh
Alive-counter byte (seed value = 0)
TRANSACTION 2
StarttransmittingtheWRITEALLsequencefromthetransmitqueue
B0h
xxh
WR_NXT_LD_QSPIcommandbyte
TRANSACTION 3
Checkifamessagehasbeenreceivedintothereceivebuffer
01h
xxh
ReadRX_Statusregister
xxh
12h
IfRX_Status[1]istrue,continue.Otherwise,repeatuntiltrueortimeout.
TRANSACTION 4
ReadreceivebuffertoverifythesentWRITEALLmessage
93h
xxh
RD_NXT_MSGSPI
xxh
02h
Sentcommandbyte(WRITEALL)
xxh
12h
Sent address
xxh
B1h
SentLSbyte
xxh
B2h
Sent MS byte
xxh
C4h
SentPEC
xxh
02h
Alive-counterbyte(=sentseed+2,ifalivecounterenabled)
TRANSACTION 5
Checkforreceivebuffererrors
09h
xxh
ReadRX_Interrupt_Flagsregister
xxh
00h
Ifnoerrors,continue.Otherwise,clearandgotoerrorroutine.
TRANSACTION 6
LoadtheREADALLcommandsequenceintotheloadqueue
C0h
xxh
WR_NXT_LD_QSPIcommandbyte
09h
xxh
Messagelength(5+2xn=9)
03h
xxh
READALLcommandbyte
12h
xxh
Register address
00h
xxh
Data-checkbyte(seedvalue=00h)
CBh
xxh
PECbyteforbytes03h,12h,00h
00h
xxh
Alive-counter byte (seed value = 00h)
TRANSACTION 7
StarttransmittingtheREADALLsequence
B0h
xxh
WR_NXT_LD_QSPIcommandbyte
TRANSACTION 8
Checkifamessagehasbeenreceivedintothereceivebuffer
01h
xxh
ReadtheRX_Statusregister
xxh
12h
IfRX_Status[1]istrue,continue.Otherwise,repeatuntiltrueortimeout.
Maxim Integrated │ 21
MAX17841B
Automotive SPI Communication Interface (ASCI)
www.maximintegrated.com



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