參數(shù)資料
型號(hào): GT3200-JN
廠商: STANDARD MICROSYSTEMS CORP
元件分類: 網(wǎng)絡(luò)接口
英文描述: USB2.0 PJY IC
中文描述: DATACOM, INTERFACE CIRCUIT, PQFP64
封裝: 7 X 7 MM, 1.40 MM HEIGHT, TQFP-64
文件頁數(shù): 26/51頁
文件大?。?/td> 1462K
代理商: GT3200-JN
USB2.0 PHY IC
Revision 1.3 (10-05-04)
21
SMSC GT3200, SMSC USB3250
DATASHEET
7.4
TX Logic
This block receives parallel data bytes placed on the DATA bus and performs the necessary transmit
operations. These operations include parallel to serial conversion, bit stuffing and NRZI encoding.
Upon valid assertion of the proper TX control lines by the SIE and TX State Machine, the TX LOGIC
block will synchronously shift, at either the FS or HS rate, the data to the FS/HS TX block to be
transmitted on the USB cable. Data transmit timing is shown in
Figure 7.4
.
Figure 7.4 Transmit Timing for a Data Packet (8-bit mode)
Figure 7.5 Transmit Timing for 16-bit Data, Even Byte Count
PID
DATA
SYNC
DATA
DATA
DATA
CRC
CRC
EOP
DATA
DATA
DATA
CRC
CRC
DATA
PID
CLK60
TXVALID
TXDATA[7:0]
TXREADY
DP/DM
CLK30
DATA[7:0]
TXREADY
TXVALID
DP/DM
PID
DATA
SYNC
DATA
DATA
DATA
DATA
CRC
CRC
PID
DATA[15:8]
DATA (0)
DATA (1)
DATA (2)
DATA (3)
DATA (4)
CRC (HI)
0
1
2
3
4
HI
VALIDH
CRC (LO)
EOP
LO
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