TSS461F datasheet(39/57 Pages) ATMEL

номер детали	TSS461F

подробное описание детали	VAN Data Link Controller

PDF	57 Pages

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производитель	ATMEL [ATMEL Corporation]

домашняя страница	http://www.atmel.com

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39 / 57 page

7615A–AUTO–02/06

TSS461F

Mailbox

The mailbox contains all the messages received or to be transmitted. Each messages is link to a

channel. The Mailbox RAM area has 128 bytes and is mapped from 0x80 to 0xFF (see

section “Mapping”).

The message (or message buffer) is composed of:

•

1 byte of message status (only used in receiving)

•

Bytes of data. These data are the bytes of the DATA field of the frame with the same

organization.

The message is pointed by the Message Pointer Register of the channel, the length of the mes-

sage is given by the Message Length & Status Register of the channel (section “Message

Pointer Register” and section “Message Length And Status Register”). This area is a pure RAM,

it contains a random value after reset.

Figure 22. Message Buffer Structure for Reception

Note:

Received DATA Frame, immediate or deffered reply

CHER CHTx

CHRx

Message Pointer Register

DRAK

M_P [6..0]

Message Length & Status Register

M_L [4..0]

RTR

RNW

RAK

M_L [4..0] = n+1

received

DATA 0

Message

ID [11..0]

SOF

DATA 0

DATA n

FCS

EOF

received

DATA n

received

M_P + 0x80 + n + 2

M_P + 0x80

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