参数资料
型号: S1R72V18B10
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PBGA121
封装: PLASTIC, FBGA-121
文件页数: 8/37页
文件大小: 365K
代理商: S1R72V18B10
4. Explanation of Functions
S1R72V18 Data Sheet (Rev. 1.00)
EPSON
11
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)
Figure 4-6
Typical data flow (with FIFO assigned for MaxPktSize and IN transfer)
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
Figure 4-7
Typical data flow (with FIFO assigned for MaxPktSize and OUT transfer)
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