W83627EG Nuvoton Technology Corporation of America, W83627EG Datasheet - Page 183
W83627EG
Manufacturer Part Number
W83627EG
Description
IC I/O CONTROLLER 128-QFP
Manufacturer
Nuvoton Technology Corporation of America
Specifications of W83627EG
Applications
PC's, PDA's
Interface
LPC
Voltage - Supply
3.3V
Package / Case
128-XFQFN
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
W83627EG
Manufacturer:
Nuvoton Technology Corporation of America
Quantity:
10 000
- Current page: 183 of 287
- Download datasheet (3Mb)
10.3.12 ECP Operation
The host must negotiate on the parallel port to determine if the peripheral supports the ECP protocol
before ECP operation. After negotiation, it is necessary to initialize some of the port bits.
nAck (PeriphClk)
Busy (PeriphAck)
PError (nAckReverse)
Select (Xflag)
NautoFd (HostAck)
nFault
(nPeriphReuqest)
nInit
(nReverseRequest)
nSelectIn (ECPMode)
(a) Set direction = 0, enabling the drivers.
NAME
TYPE
O
O
O
I
I
I
I
I
This signal indicates valid data driven by the peripheral when
asserted. This signal handshakes with nAutoFd in reverse.
This signal deasserts to indicate that the peripheral can accept
data. In the reverse direction, it indicates whether the data lines
contain ECP command information or data. Normal data are
transferred when Busy (PeriphAck) is high, and an 8-bit command
is transferred when it is low.
This signal is used to acknowledge a change in the direction of the
transfer (asserted = forward). The peripheral drives this signal low
to
nAckReverse to determine when it is permitted to drive the data
bus.
Indicates printer on-line.
Requests a byte of data from the peripheral when it is asserted. In
the forward direction, this signal indicates whether the data lines
contain ECP address or data. Normal data are transferred when
nAutoFd (HostAck) is high, and an 8-bit command is transferred
when it is low.
Generates an error interrupt when it is asserted. This signal is valid
only in the forward direction. The peripheral is permitted (but not
required) to drive this pin low to request a reverse transfer during
ECP mode.
This signal sets the transfer direction (asserted = reverse,
deasserted = forward). This pin is driven low to place the channel in
the reverse direction.
This signal is always deasserted in ECP mode.
acknowledge
W83627EHF/EF, W83627EHG/EG
- 172 -
nReverseRequest.
DESCRIPTION
The
host
relies
upon
Related parts for W83627EG
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Nuvoton Technology Corporation of America
Datasheet:
Part Number:
Description:
Manufacturer:
Nuvoton Technology Corporation of America
Datasheet:
Part Number:
Description:
Manufacturer:
Nuvoton Technology Corporation of America
Datasheet:
Part Number:
Description:
Manufacturer:
Nuvoton Technology Corporation of America
Datasheet:
Part Number:
Description:
Manufacturer:
Nuvoton Technology Corporation of America
Datasheet:
Part Number:
Description:
Manufacturer:
Nuvoton Technology Corporation of America
Datasheet:
Part Number:
Description:
Manufacturer:
Nuvoton Technology Corporation of America
Datasheet: