PDIUSBH11NB PHILIPS [NXP Semiconductors], PDIUSBH11NB Datasheet - Page 10

• Manufacturer Part Number: PDIUSBH11NB
• Description: Universal Serial Bus Hub
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Read Last Transaction Status
Command
Data
The Read Last Transaction Status command is followed by one data read that returns the status of the last transaction of the endpoint. This
command also resets the corresponding interrupt flag in the interrupt register, and clears the status, indicating that it was read.
This command is useful for debugging purposes. Since it keeps track of every transaction, the status information is overwritten for each new
transaction.
Table 1.
1997 Aug 01
Universal Serial Bus Hub
ERROR CODE
DATA RECEIVE / TRANSMIT SUCCESS
ERROR CODE
SETUP PACKET
DATA 0/1 PACKET
PREVIOUS STATUS NOT READ
0000
0001
0010
0011
0100
0101
0110
1000
1001
1010
1011
1101
0111
1111
: 40–44h
: Read 1 byte
7
0
6
0
5
0
RESULT
No Error
PID Encoding Error, Bits 7–4 are not the inversion of bits 3–0
PID Unknown, encoding is valid, but PID does not exist
Unexpected Packet, Packet is not of the type expected (= token, data or acknowledge), or SETUP token to a
non-control endpoint
Token CRC Error
Data CRC Error
Time Out Error
Babble Error
Unexpected End of Packet
Sent or Received NAK
Sent Stall, a token was received, but the endpoint was stalled
Overflow Error, the received packet was longer than the available buffer space
Bitstuff Error
Wrong DATA PID, the received DATA PID was not the expected one
4
0
3
0
2
0
1
0
A ‘1’ INDICATES THE LAST RECEIVED PACKET HAD A SETUP TOKEN (THIS ALWAYS READ ‘0’ FOR IN BUFFERS.
A ‘1’ INDICATES THAT THE LAST RECEIVED OR SENT PACKET HAD A DATA1 PID
SEE TABLE 1
A ‘1’ INDICATES A SECOND EVENT OCCURRED BEFORE THE PREVIOUS STATUS WAS READ.
0
0
A ‘1’ INDICATES DATA HAS BEEN RECEIVED OR TRANSMITTED SUCCESSFULLY
POWER ON VALUE
DATA RECEIVE / TRANSMIT SUCCESS
ERROR CODE (SEE TABLE 1)
SETUP PACKET
DATA 0/1 PACKET
PREVIOUS STATUS NOT READ
10
PDIUSBH11
Product specification
SV00507