參數資料
型號: MC68HC05JB4DW
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數: 132/134頁
文件大小: 2440K
代理商: MC68HC05JB4DW
February 24, 1999
GENERAL RELEASE SPECIFICATION
MC68HC05JB4
UNIVERSAL SERIAL BUS MODULE
REV 2
Figure 10-32. IN Token Data Flow for Transmit Endpoint 1/2
Transmit Endpoint Enabled?
(USBEN = 1)
Transmit Endpoint ready to Transfer?
(TX1E = 1) && (TXD1F = 0) &
No Response
from USB function
Send NAK
Handshake
Set TXD1F to 1
Transmit Endpoint
Interrupt Enabled?
(TXD1IE = 1)
No Interrupt
Valid transaction
Interrupt generated
Transmit Endpoint not Stalled by firmware?
(STALL1 & ENDP1) + (STALL2 & ENDP2)
Send STALL
Handshake
Send DATA
Data PID set by T1SEQ
Valid IN token
received for Endpoints 1 or 2
N
Y
N
Y
ACK received and no
Time-out condition occurs?
No Response
from USB function
N
Y
((ENDP2 & ENDADD) + (ENDP1 & ENDADD))
ENDP1 is Endpoint 1 directed traffic
ENDP2 is Endpoint 2 directed traffic
Note:
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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