W712 Datasheet, PDF (6/17 Pages) OKI electronic componets – Universal Serial Bus Controller 0.5uM Technology Mega Macrofunction

s W712 USB Device Controller s –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
SIGNAL DESCRIPTIONS
USB Interface
Signal
usb_dpin
usb_dmin
usb_dpout
usb_dmout
usb_rxd
usb_txenb
Type
Input
Input
Output
Output
Input
Output
Assertion
Description
USB Data Plus In. This input and the usb_dmin input are the received single ended data
from the USB transceiver. The table below shows values and results for these signals.
usb_dpin
—
0
0
1
1
usb_dmin
0
1
0
1
Result
SE0
Logic “0”
Logic “1”
Undefined
USB Data Minus In. This input and the usb_dpin input are the received single ended data
—
from the USB transceiver. See the table for the usb_dpin description, above, for values
and results of these signals.
USB Data Plus Out. This output and the usb_dmout signal come from the USB transmit
engine and drive the differential output buffers. The table below shows values and results
for these signals.
usb_dpout
—
0
0
1
1
usb_dmout
0
1
0
1
Result
SE0
Logic “0”
Logic “1”
Undefined
USB Data Minus Out. This output and the usb_dpout signal come from the USB transmit
—
engine and drive the differential output buffers. See the signal description for usb_dpout,
above, for a description of signal values and results.
—
USB Differential Received Data. This input comes from the USB differential receiver, and
connects to the W712 mega macrofunction.
USB 3-State Output Enable. This signal connects to the transceiver EB input through an
LOW inverter gate. When the W712 mega macrofunction asserts this signal LOW, the transceiv-
er transmits data on the USB bus. See Appendix for the USB transceiver Data Sheets.
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Oki Semiconductor