SCD1284 INTEL [Intel Corporation], SCD1284 Datasheet - Page 135
SCD1284
Manufacturer Part Number
SCD1284
Description
IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
Manufacturer
INTEL [Intel Corporation]
Datasheet
1.SCD1284.pdf
(176 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SCD128410QCE
Manufacturer:
INTEL
Quantity:
20 000
- Current page: 135 of 176
- Download datasheet (3Mb)
7.6.8
7.6.9
Datasheet
Register Name: SRER
Register Description: Serial Service Request Enable
Access: Read/Write
Register Name: TBPR
Register Description: Transmit Baud Rate Period
Access: Read/Write
MdmChg
Bit 7
Bit 7
Bit
6:5
2:1
7
4
3
0
Serial Service Request Enable Register
This register enables the conditions that cause the CD1284, to post a service request by the SVRR
and the SVCREQ* output pins, and applies to the serial channels only. Each of the individual
enable bits control one type of service request.
Transmit Baud Rate Period Register
This register holds the baud rate divisor for the transmitter and is used in conjunction with the
TCOR. This provides the clock, which is divided by this value. The time period produced must
equal the value for one bit time of the transmit data.
Modem Change: This bit enables the Modem Change service request. When this bit is ‘1’, any selected
modem signal change conditions (as programmed by MCOR1 and MCOR2) cause a modem service request
to be posted.
These bits must always be ‘0’.
Receive Data Enable: This bit enables the posting of receive service requests when characters have been
received and either the FIFO reaches the programmed threshold (set by COR3) or the receive timeout period
has expired.
This bit must always be ‘0’.
Transmitter Ready and Transmitter Empty: The transmitter can be enabled to post service requests on one
of two conditions: either the FIFO is empty or the Transmitter Shift register is empty.
TxRdy enables the service request on the condition that the FIFO is empty. In this case, there are still two
characters available for transmission before the transmitter underruns (one in the Shift register and one in the
Holding register).
TxEmpty enables the service request on the condition that the Shift register is empty. The transmitter
underruns due to the latency experienced between the time the service request is posted and the time the
host can load the FIFO. Under normal operating conditions, TxEmpty is set and TxRdy reset when there is no
more data to transmit and the host requires notification that the last character was sent before it can disable
the transmitter.
No New Data Timeout Enable: This bit activates the optional exception service request when all data is
removed from the FIFO and no new data has arrived after a preprogrammed delay period set by the value in
the RTPR. The LIVR (or RIVR) indicates a receive exception in the IT2–IT0 vector bits. There is no data
associated with this exception service request. RDSR[7] indicates that the service request is for an NNDT
condition.
Bit 6
Bit 6
0
Bit 5
Bit 5
0
IEEE 1284-Compatible Parallel Interface Controller — CD1284
RxData
Bit 4
Bit 4
Binary Divisor Value
Description
Bit 3
Bit 3
0
TxRdy
Bit 2
Bit 2
TxEmpty
Bit 1
Bit 1
8-Bit Hex Address: 72
8-Bit Hex Address: 06
Default Value: 41
Default Value: 00
NNDT
Bit 0
Bit 0
135
Related parts for SCD1284
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Microprocessor: Intel Celeron M Processor 320 and Ultra Low Voltage Intel Celeron M Processor at 600MHz
Manufacturer:
Intel Corporation
Part Number:
Description:
Intel 82550 Fast Ethernet Multifunction PCI/CardBus Controller
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 32 Mbit. Access speed 120 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 32 Mbit. Access speed 120 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 64 Mbit. Access speed 150 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 32 Mbit. Access speed 100 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
DA28F640J5A-1505 Volt Intel StrataFlash Memory
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
5 Volt Intel StrataFlash?? Memory
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
5 Volt Intel StrataFlash?? Memory
Manufacturer:
Intel Corporation
Part Number:
Description:
Intel 6300ESB I/O Controller Hub
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel 82801DB I/O Controller Hub (ICH4), Pb-Free SLI
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel 82801FB I/O Controller Hub (ICH6)
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel Strataflash Memory28F128J3 28F640J3 28F320J3
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Controllers, Intel 430TX PCIset: 82439TX System Controller (MTXC)
Manufacturer:
Intel Corporation