MK50H25DIP datasheet(36/64 Pages) STMICROELECTRONICS

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UIR

UI Received indicates a UI frame has been received and is in this buffer.

FRMRR

FRMR Received indicates the I-field of a FRMR is stored in this buffer.

In Transparent mode with RBFCS=1 (IADR+16) it indicates received

frame referenced by this Message Descriptor has a bad FCS.

RADR

Valid only in Transparent Mode with address filtering enabled, RADR

indicates which of the 2 programmable addresses the frame matched.

If set, the received address field matched the value in the Local Ad-

dress field of the Initialization Block. Otherwise it matched the value in

the Remote Address field.

RPF

Valid only for UI, XID, and TEST frames. RPF equals the state of the P

or F bit for the received frame.

07:00

RBADR

The High Order 8 address bits of the buffer pointed to by this descriptor.

This field is written by the Host and unchanged by MK50H25.

4.3.1.2 Receive Message Descriptor 1 (RMD1)

BIT

NAME

DESCRIPTION

15:01

RBADR

The low order 16 address bits of the receive buffer pointed to by this

descriptor. RBADR is written by the Host CPU and unchanged by

MK50H25. The receive buffers must be word aligned.

4.3.1.3 Receive Message Descriptor 2 (RMD2)

BIT

NAME

DESCRIPTION

15:00

BCNT

Buffer Byte Count is the length of the buffer pointed to by this

descriptor expressed in two’s complement. This field is written to by

the Host and unchanged by MK50H25. The value of BCNT must be

an even number.

RBADR<15:00>

BCNT<15:00>

MK50H25

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