mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 208

• Manufacturer Part Number: mc68hc908ld64
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Universal Serial Bus Module (USB)
14.6.9 USB Hub Status Register (HSR)
Data Sheet
208
Address:
RSEQ — Hub Endpoint 0 Receive Sequence Bit
SETUP — Hub SETUP Token Detect Bit
TX1ST — Hub Transmit First Flag
TX1STR — Clear Hub Transmit First Flag
Reset:
Read:
Write:
This read-only bit indicates the type of data packet last received for
hub endpoint 0 (DATA0 or DATA1).
This read-only bit indicates that a valid SETUP token has been
received.
This read-only bit is set if the hub endpoint 0 data transmit flag (TXDF)
is set when the USB control logic is setting the hub endpoint 0 data
receive flag (RXDF). That is, TXDF is still set at the end of an
endpoint 0 reception. This bit allows the software to know that the
endpoint 0 transmission happened before the endpoint 0 reception.
Reset clears this bit.
Writing a logic 1 to this write-only bit will clear the TX1ST bit if it is set.
Reset clears this bit.
1 = DATA1 token received in last hub endpoint 0 receive
0 = DATA0 token received in last hub endpoint 0 receive
1 = Last token received for hub endpoint 0 was a SETUP token
0 = Last token received for hub endpoint 0 was not a SETUP token
1 = IN transaction occurred before SETUP/OUT
0 = IN transaction occurred after SETUP/OUT
1 = Write 1 to clear the TX1ST bit
0 = No effect
X = Indeterminate
$005D
RSEQ
Bit 7
Universal Serial Bus Module (USB)
X
Figure 14-11. USB Hub Status Register (HSR)
SETUP
6
X
TX1ST
5
X
= Unimplemented
TX1STR
4
0
0
RPSIZ3
3
X
MC68HC908LD64
RPSIZ2
Freescale Semiconductor
2
X
RPSIZ1
X
1
—
RPSIZ0
Rev. 3.0
Bit 0
X