mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 205

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

14.6.7 USB Hub Control Register 0 (HCR0)
MC68HC908LD64
Freescale Semiconductor
—
Rev. 3.0
Address:
TSEQ — Hub Endpoint 0 Transmit Sequence Bit
STALL0 — Hub Endpoint 0 Force Stall Bit
TXE — Hub Endpoint 0 Transmit Enable
Reset:
Read:
Write:
This read/write bit determines which type of data packet (DATA0 or
DATA1) will be sent during the next IN transaction directed at
endpoint 0. Toggling of this bit must be controlled by software. Reset
clears this bit.
This read/write bit causes hub endpoint 0 to return a STALL
handshake when polled by either an IN or OUT token by the host. The
USB hardware clears this bit when a SETUP token is received. Reset
clears this bit.
This read/write bit enables a transmit to occur when the USB host
controller sends an IN token to the hub endpoint 0. Software should
set this bit when data is ready to be transmitted. It must be cleared by
software when no more hub endpoint 0 data packets needs to be
transmitted. If this bit is 0 or the TXDF is set, the USB will respond with
a NAK handshake to any hub endpoint 0 IN tokens. Reset clears this
bit.
1 = DATA1 token active for next hub endpoint 0 transmit
0 = DATA0 token active for next hub endpoint 0 transmit
1 = Send STALL handshake
0 = Default
1 = Data is ready to be sent
0 = Data is not ready; respond with NAK
$005B
TSEQ
Bit 7
Figure 14-9. USB Hub Control Register 0 (HCR0)
Universal Serial Bus Module (USB)
0
STALL0
6
0
TXE
5
0
RXE
4
0
TPSIZ3
Universal Serial Bus Module (USB)
3
0
TPSIZ2
Hub Function I/O Registers
2
0
TPSIZ1
1
0
Data Sheet
TPSIZ0
Bit 0
0
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