68HC705JB4 datasheet(90/134 Pages) FREESCALE

90 / 134 page

GENERAL RELEASE SPECIFICATION

February 24, 1999

MOTOROLA

UNIVERSAL SERIAL BUS MODULE

MC68HC05JB4

10-24

REV 2

TX1STR — Clear Transmit First Flag

Writing a logic 1 to this write-only bit will clear the TX1ST bit if it is set. Writing a

logic 0 to the TX1STR has no effect. Reset clears this bit.

TX1ST — Transmit First Flag

This read-only bit is set if the Endpoint 0 Data Transmit Flag (TXD0F) is set

when the USB control logic is setting the Endpoint 0 Data Receive Flag

(RXD0F). That is, this bit will be set if an Endpoint 0 Transmit Flag is still set at

the end of an Endpoint 0 reception. This bit lets the ﬁrmware know that the

Endpoint 0 transmission happened before the Endpoint 0 reception. Reset

clears this bit.

1 =

IN transaction occurred before SETUP/OUT.

0 =

IN transaction occurred after SETUP/OUT.

ENABLE2 — Endpoint 2 Enable

This read/write bit enables Endpoint 2 and allows the USB to respond to IN

packets addressed to Endpoint 2. Reset clears this bit.

1 =

Endpoint 2 is enabled and can respond to an IN token.

0 =

Endpoint 2 is disabled

ENABLE1 — Endpoint 1 Enable

This read/write bit enables Endpoint 1 and allows the USB to respond to IN

packets addressed to Endpoint 1. Reset clears this bit.

1 =

Endpoint 1 is enabled and can respond to an IN token.

0 =

Endpoint 1 is disabled

STALL2 — Endpoint 2 Force Stall Bit

This read/write bit causes Endpoint 2 to return a STALL handshake when

polled by either an IN or OUT token by the USB Host Controller. Reset clears

this bit.

1 =

Send STALL handshake.

0 =

Default

STALL1 — Endpoint 1 Force Stall Bit

This read/write bit causes Endpoint 1 to return a STALL handshake when

polled by either an IN or OUT token by the USB Host Controller. Reset clears

this bit.

1 =

Send STALL handshake

0 =

Default

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

68HC705JB4 bảng dữ liệu(PDF) 90 Page - Freescale Semiconductor, Inc

68HC705JB4 bảng dữ liệu(HTML) 90 Page - Freescale Semiconductor, Inc

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 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL