參數(shù)資料
型號： MC68HC05JB4DW
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PDSO28
封裝： SOIC-28
文件頁數(shù)： 120/134頁
文件大?。?/td> 2440K
代理商： MC68HC05JB4DW
GENERAL RELEASE SPECIFICATION
February 24, 1999
UNIVERSAL SERIAL BUS MODULE
REV
SUSPND — USB Suspend Flag
To save power, this read/write bit should be set by the software if a 3ms con-
stant idle state is detected on USB bus. Setting this bit stops the clock to the
USB and causes the USB module to enter Suspend mode. Unnecessary ana-
log circuitry will be powered down. Software must clear this bit after the
Resume ag (RESUMF) is set while this Resume interrupt ag is serviced.
TXD0IE — Endpoint 0 Transmit Interrupt Enable
This read/write bit enables the Transmit Endpoint 0 to generate a USB interrupt
when the TXD0F bit becomes set.
1 =
USB interrupts enabled for Transmit Endpoint 0
0 =
USB interrupts disabled for Transmit Endpoint 0
RXD0IE — Endpoint 0 Receive Interrupt Enable
This read/write bit enables the Transmit Endpoint 0 to generate a USB interrupt
when the RXD0F bit becomes set.
1 =
USB interrupts enabled for Receive Endpoint 0
0 =
USB interrupts disabled for Receive Endpoint 0
TXD0FR — Endpoint 0 Transmit Flag Reset
Writing a logic 1 to this write only bit will clear the TXD0F bit if it is set.Writing a
logic 0 to TXD0FR has no effect. Reset clears this bit.
RXD0FR — Endpoint 0 Receive Flag Reset
Writing a logic 1 to this write only bit will clear the RXD0F bit if it is set.Writing a
logic 0 to RXD0FR has no effect. Reset clears this bit.
10.5.3 USB Interrupt Register 1 (UIR1)
TXD1F — Endpoint 1/Endpoint 2 Data Transmit Flag
This read only bit is shared by Endpoint 1 and Endpoint 2. It is set after the data
stored in the shared Endpoint 1/Endpoint 2 transmit buffer has been sent and
an ACK handshake packet from the host is received. Once the next set of data
is ready in the transmit buffers, software must clear this ag by writing a logic 1
to the TXD1FR bit. To enable the next data packet transmission, TX1E must
also be set. If TXD1F bit is not cleared, a NAK handshake will be returned in
the next IN transaction.
Reset clears this bit. Writing a logic 0 to TXD1F has no effect.
1 =
Transmit on Endpoint 1 or Endpoint 2 has occurred
0 =
Transmit on Endpoint 1 or Endpoint 2 has not occurred
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
UIR1
R
TXD1F
EOPF
RESUMF
0
TXD1IE
EOPIE
00
$003A
W
RESUMFR
TXD1FR
EOPFR
reset:
00000000
= Unimplemented
Figure 10-22. USB Interrupt Register 1(UIR1)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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