参数资料
型号: S1R72C05B08
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PBGA121
封装: 8 X 8 MM, 0.65 MM PITCH, PLASTIC, TFBGA-121
文件页数: 7/49页
文件大小: 545K
代理商: S1R72C05B08
4. FUNCTIONS
10
EPSON
S1R72C05*** Data Sheet (Rev.1.00)
FIFO
CPU
Channel
USB Device
NAK handshake
IN token
Free quantity >=
MaxPktSize
Free quantity <
MaxPktSize
Transfer received
Free quantity >=
MaxPktSize
FIFO_Empty
Read
Write
FIFO_Full
FIFO_Empty
Empty
Data
Read
DATA packet
IN token
ACK handshake
IN token
NAK handshake
IN transaction
(NAK response)
IN transaction
(NAK response)
IN transaction
(Data reply)
Fig.4.6 Typical data flow (with FIFO assigned for MaxPktSize and IN transfers)
FIFO
Channel
USB Device
Data quantity <
MaxPktSize
Data quantity >=
MaxPktSize
CPU
Write
FIFO_Empty
Write
Data quantity <
MaxPktSize
Write
Read
Transfer sent
FIFO_Full
Data quantity >=
MaxPktSize
OUT token
DATA packet
ACK handshake
OUT token
DATA packet
ACK handshake
Empty
Data
OUT transaction
Transfer sent
Fig.4.7 Typical data flow (with FIFO assigned for MaxPktSize and OUT transfers)
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