MK50H25 datasheet(38/64 Pages) STMICROELECTRONICS

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TUI

Transmit a UI frame indicates that a UI frame is to be transmitted from

the transmit buffer instead of a normal I frame. This bit must be set

for anything transmitted in Transparent Mode.

TINTD

Transmit Interrupt Disable. If this bit is set, no transmit interrupt is

generated when ownership of this descriptor is released back to the

host.

Reserved, must be written as zeroes.

XPF

Transmit P/F bit instructs the MK50H25 to send the corresponding frame

with the respective value for the P/F bit. This bit is valid is valid only for

UI, XID and TEST frames and should be written zero otherwise.

07:00

TBADR

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.

4.3.2.2 Transmit Message Descriptor 1 (TMD1)

BIT

NAME

DESCRIPTION

15:00

TBADR

The Low Order 16 address bits of the buffer pointed to by this descriptor.

TBADR is written by the Host and unchanged by MK50H25. The least

significant bit is zero since the descriptor must be word aligned.

4.3.2.3 Transmit Message Descriptor 2 (TMD2)

BIT

NAME

DESCRIPTION

15:00

BCNT

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

descriptor expressed in two’s complement. This field is not used by

the MK50H25.

TBADR<15:00>

BCNT<15:00>

MK50H25

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MK50H25 Datasheet(PDF) 38 Page - STMicroelectronics