參數(shù)資料
型號： MC68HC705JB2DW
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDSO20
封裝： SOIC-20
文件頁數(shù)： 99/128頁
文件大?。?/td> 2493K
代理商： MC68HC705JB2DW
GENERAL RELEASE SPECIFICATION
August 28, 1998
UNIVERSAL SERIAL BUS MODULE
MC68HC705JB2
10-4
REV 1.1
Figure 10-3. Supported USB Packet Types
The following sections will give some detail on each segment used to form a
complete USB transaction.
10.2.1.1 Sync Pattern
The NRZI (See Section 10.4.4.1) bit pattern shown in Figure 10-4 is used as a
synchronization pattern and is prexed to each packet. This pattern is equivalent
to a data pattern of seven 0’s followed by a 1 (0x80).
Figure 10-4. Sync Pattern
The start of a packet (SOP) is signaled by the originating port by driving the D+
and D- lines from the idle state (also referred to as the “J” state) to the opposite
logic level (also referred to as the “K” state). This switch in levels represents the
rst bit of the Sync eld. Figure 10-5 shows the data signaling and voltage levels
for the start of packet and the sync pattern.
Token Packet:
IN
OUT
SYNC
PID
ADDR
ENDP
CRC5
EOP
SETUP
Data Packet:
DATA0
SYNC
PID
DATA
CRC5
EOP
DATA1
0 - 8 bytes
Handshake Packet:
ACK
NAK
SYNC
PID
EOP
STALL
SYNC PATTERN
PID0
PID1
Idle
NRZI Data
Encoding
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關PDF資料
PDF描述
MC68HC705JB2P 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDIP20
MC68HC705JB4P 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDIP28
MC68HC705K1CDW 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDSO16
MC68HC705K1CP 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP16
MC68HC705K1S 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, CDIP16
相關代理商/技術參數(shù)
參數(shù)描述
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MC68HC705JP7CP 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
MC68HC705K1CDW 制造商:Motorola Inc 功能描述:
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