PC8374L datasheet(3/239 Pages) NSC

3 / 239 page

Features (Continued)

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Revision 1.1

■ Configuration Control

— PnP Conﬁguration Register structure

— PC01 Specification Revision 1.0, 1999-2000 compliant

— Base Address strap (BADDR) to setup the address

of the Index-Data register pair (defaults to 2Eh/2Fh)

— Flexible resource allocation for all logical devices:

❏ Relocatable base address

❏ 15 IRQ routing options to serial IRQ

❏ Up to four optional 8-bit DMA channels

— Conﬁgurable feature sets:

❏ Software selectable

❏ VSB3-powered pin multiplexing

Legacy Modules

■ Serial Ports 1 and 2

— Software-compatible with the NS16550A and NS16450

— Support shadow register for write-only bit monitoring

— Data rates up to 1.5 Mbaud

■ Serial Infrared Port (SIR)

— Software compatible with the 16550A and the 16450

— Shadow register support for write-only bit monitoring

— HP-SIR

— ASK-IR option of SHARP-IR

— DASK-IR option of SHARP-IR

— Consumer Remote Control supports RC-5, RC-6,

NEC, RCA and RECS 80

■ IEEE 1284-compliant Parallel Port

— ECP, with Level 2 (14 mA sink and source output buffers)

— Software or hardware control

— Enhanced Parallel Port (EPP) compatible with EPP

1.7 and EPP 1.9

— Supports EPP as mode 4 of the Extended Control

— Selection of internal pull-up or pull-down resistor for

Paper End (PE) pin

— Supports a demand DMA mode mechanism and a

DMA fairness mechanism for improved bus utilization

— Protection circuit that prevents damage to the

parallel port when a printer connected to it is pow-

ered up or is operated at high voltages (in both

cases, even if the PC8374L is in power-down state)

■ Floppy Disk Controller (FDC)

— Software compatible with the PC8477 (the PC8477

contains a superset of the FDC functions in the

µDP8473, NEC µPD765A/B and N82077 devices)

— Error-free handling of data overrun and underrun

— Programmable write protect

— Supports FM and MFM modes

— Supports Enhanced mode command for three-mode

Floppy Disk Drive (FDD)

— Perpendicular recording drive support for 2.88 MBytes

— Burst (16-byte FIFO) and Non-Burst modes

— Full support for IBM Tape Drive Register (TDR) im-

plementation of AT and PS/2 drive types

— High-performance digital separator

— Supports fast tape drives (2 Mbps) and standard

tape drives (1 Mbps, 500 Kbps and 250 Kbps)

■ Keyboard and Mouse Controller (KBC)

— 8-bit

microcontroller,

software

compatible

with

8042AH and PC87911

— Standard interface (60h, 64h, IRQ1 and IRQ12)

— Supports two external swapable PS/2 interfaces for

keyboard and mouse

— Programmable, dedicated quasi-bidirectional I/O

lines (GA20/P21, KBRST/P20)

Clocking, Supply, and Package Information

■ Clocks

— LPC (PCI) clock input (up to 33 MHz)

— On-chip Clock Generator:

❏ Generates 48 MHz clock

❏ Generates 32.768 KHz internal clock

❏ VSB3 powered

❏ Based on the 14.31818 MHz clock input

■ Protection

— All pins are 5V tolerant and back-drive protected

(except LPC bus pins)

— High ESD protection of all the pins

— Pin multiplexing selection lock

— Conﬁguration register lock

■ Testability

— XOR tree structure

❏ Includes all the pins (except supply, analog and not

connected pins)

❏ Selected at power-up by strap input (TEST)

— TRI-STATE pins, selected at power-up by strap input

(TRIS)

■ Power Supply

— 3.3V supply operation

— Separate pin pairs for main (VDD3) and standby

(VSB3) power supplies

— Backup battery input (VBAT) for SWC indications

— Low standby power consumption

— Very low power consumption from backup battery

(less than 0.5

µA)

■ Package

— 128-pin PQFP

Winbond Electronics Corp. Advanced PC Product Center

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