mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 206

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

Universal Serial Bus Module (USB)
14.6.8 USB Hub Endpoint 1 Control and Data Register (HCDR)
Data Sheet
206
Figure 14-10. USB Hub Endpoint 1 Control and Data Register (HCDR)
Address:
RXE — Hub Endpoint 0 Receive Enable
TPSIZ[3:0] — Hub Endpoint 0 Transmit Data Packet Size
STALL1 — Hub Endpoint 1 Force Stall Bit
PNEW — Port New Status Change
Reset:
Read:
Write:
This read/write bit enables a receive to occur when the USB host
controller sends an OUT token to the hub endpoint 0. Software should
set this bit when data is ready to be received. It must be cleared by
software when data cannot be received. If this bit is 0 or the RXDF is
set, the USB will respond with a NAK handshake to any hub
endpoint 0 OUT tokens. Reset clears this bit.
These read/write bits store the number of transmit data bytes for the
next IN token request for hub endpoint 0. These bits are cleared by
reset.
This read/write bit causes hub endpoint 1 to return a STALL
handshake when polled by the host. Reset clears this bit.
This read/write bit enables a transmit to occur when the USB Host
controller sends an IN token to hub endpoint 1. Software should set
this bit when there is a status change on any of the downstream ports,
embedded device or hub. It must be cleared by software when there
1 = Data is ready to be received
0 = Not ready for data; respond with NAK
1 = Send STALL handshake
0 = Default
STALL1
$005C
Bit 7
Universal Serial Bus Module (USB)
0
PNEW
6
0
PCHG5
5
0
PCHG4
4
0
PCHG3
3
0
MC68HC908LD64
PCHG2
Freescale Semiconductor
2
0
PCHG1
1
0
—
PCHG0
Rev. 3.0
Bit 0
0