USB97C100QFP datasheet(39/64 Pages) SMSC

39 / 64 page

SMSC DS – USB97C100

Page 39

Rev. 01/03/2001

011

Remove Packet from top of RX Queue : To be issued after MCU has completed processing the

packet number at the RXFIFO.

100

Remove and Release Top of RXFIFO : Same as (011), but also frees all memory used by the

packet. This command is especially useful as a quick way to "ignore" bad packets.

101

Release specific Packet : Frees all pages allocated to the packet specified in the PNR.

110

Enqueue Packet into Endpoint x : Places the Packet number indicated by the PNR register in

the transmit queue of the endpoint pointed to by the MMUTX_SEL register. The MMUTX_SEL

111

Reset TX Endpoint x : Resets the TX FIFO holding the packet numbers awaiting transmission

and the TXFIFO_STAT bits of the endpoint pointed to by the MMUTX_SEL register. The

MMUTX_SEL register must be written before this command is issued. This command does not

release any memory allocated to packets that are dequeued.

Table 64 - Allocation Result Register

ARR

(0x7F54)

ALLOCATION RESULT REGISTER

BIT

NAME

R/W

DESCRIPTION

7FAILED

[6:5]

Reserved

[4:0]

P[4:0]

Returns Packet Number (0-31, 0x00-0x1F) from an allocation

command. This can be written directly into the PNR register

Table 65 - Packet Number Register

PNR (0x7F55)

PACKET NUMBER REGISTER

BIT

NAME

R/W

DESCRIPTION

[7:5

Reserved

[4:0]

P[4:0]

R/W

Packet selector to access packet at 0x6000 buffer window

USB97C100QFP 数据表(PDF) 39 Page - SMSC Corporation

USB97C100QFP 数据表(HTML) 39 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

数据表下载