FT121 Datasheet, PDF (27/46 Pages) Future Technology Devices International Ltd. – FT121 ENHANCED USB DEVICE CONTROLLER WITH SPI SLAVE IC Datasheet Version 1.2

Document No.: FT_000648
FT121 ENHANCED USB DEVICE CONTROLLER WITH SPI SLAVE IC
Datasheet Version 1.2
Clearance No.: FTDI# 312
6.3.2 Select Endpoint
Command
Data
: 00-05h (00-0Fh for Enhanced Mode)
: Read 1 byte
Bit
Symbol
Reset
Description
0 Full/Empty
0
0: selected endpoint buffer is empty
1: selected endpoint buffer is not empty
1 Stall
0
0: selected endpoint is not stalled
1: selected endpoint is stalled
7-2 Reserved
0b’xxxxxx Reserved
Table 6.13 Endpoint Status Register
6.3.3 Read Last Transaction Status
Command
Data
: 40-45h (40-4Fh for Enhanced Mode)
: Read 1 byte
Bit
Symbol
Reset
Description
0 Data Receive/Transmit
Success
0
0: indicate USB data receive or transmit not OK
1: indicate USB data receive or transmit OK
4-1 Error Code
0b’0000 Refer to Table 6.15
5 Setup Packet
0
0: indicate not a setup packet
1: indicate last received packet has a SETUP token
6 Data 0/1 Packet
0
0: packet has a DATA0 token
1: packet has a DATA1 token
7 Previous Status not
Read
0
0: previous transaction status was read
1: previous transaction status was not read
Table 6.14 Endpoint Last Transaction Status Register
Error Code
0000
0001
Result
No error
PID encoding error
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