參數(shù)資料
型號: MC68HC705JB4DWR2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數(shù): 125/134頁
文件大?。?/td> 1305K
代理商: MC68HC705JB4DWR2
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 rmware 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
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