Maxim-integrated MAXQ7667 Manual de usuario descargar pdf (Pagina 139)

8.3.6 Checksum Register (UART) (CHKSUM)

egister Name:

HKSUM

Bits 15 to 8: Received Checksum (CHKSUM[15:8]).

This register reflects the checksum that was received on the bus during the most

recent LIN frame. This register is updated by hardware whenever a complete frame is transmitted or received.

Bits 7 to 0: Calculated Checksum (CHKSUM[7:0]). This register reflects the checksum that was calculated by the peripheral for the

most recent LIN frame. This register is updated by hardware whenever a complete frame is transmitted or received. When the periph-

eral is receiving a frame, the checksum is calculated from the data received on the bus. When the peripheral is transmitting a frame,

the checksum is calculated from the data that is being transmitted.

8-9 ___________________________________________________________________________________________________________

MAXQ7667 User’s Guide

r = read, w = write

Note: CHKSUM is cleared to 0000h on all forms of reset.

Bit #

15 14 13 12 11 10 9 8

Name CHKSUM15 CHKSUM14 CHKSUM13 CHKSU M12 CHKSUM11 CHKSUM10 CHKS U M9 C HKS UM8

eset 0 0 0 0 0 0 0 0

ccess rw rw r w r w rw rw rw r w

it #

6543210

Name CHKSUM7 CHKSUM6 CHKSUM5 CHKSUM4 CHKSUM3 CHKSUM2 CHKSUM1 CHKSUM0

Reset 0 0 0 0 0 0 0 0

Access rw rw rw rw rw rw rw rw

1 2 ... 134 135 136 137 138 139 140 141 142 143 144 ... 346 347

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Maxim-integrated MAXQ7667 Manual de usuario Pagina 139