mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 821

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

16.10.8.5 USB COMMAND REGISTER. The 8-bit, read/write USB command (USCOM)
register is used to start USB transmit operation.
STR—Start FIFO Fill
When set, this bit causes the USB controller to start filling the corresponding endpoint
transmit FIFO with data. Actual transmission will begin once the IN token for this endpoint
is received. The STR bit is always read as a zero.
FLUSH—Flush FIFO
When set, this bit causes the USB controller to flush the corresponding endpoint transmit
FIFO. Before flushing the FIFO, you must issue the STOP TX ENDPOINT command. After
you flush the FIFO, issue the RESTART TX ENDPOINT command (see
Section 16.10.6 USB Commands for more information). The FLUSH bit is always read as
a zero.
Bits 2–5—Reserved
These bits are reserved and must be set to zero.
EP—Endpoint
This field selects one of the four supported endpoints.
USCOM
RESET
FIELD
ADDR
R/W
BIT
STR
R/W
0
0
FLUSH
R/W
Freescale Semiconductor, Inc.
1
0
For More Information On This Product,
MPC823 REFERENCE MANUAL
2
Go to: www.freescale.com
(IMMR & 0xFFFF0000) + 0xA02
3
RESERVED
R/W
0
4
Communication Processor Module
5
6
R/W
EP
0
16-369
7