 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
PC87393F Datasheet(PDF) 121 Page - National Semiconductor (TI) |
|
|
|
|||||||||||||||||||||||||||||
PC87393F Datasheet(HTML) 121 Page - National Semiconductor (TI) |
|
|
121 / 148 page  121 www.national.com 8.0 Legacy Functional Blocks This chapter briefly describes the following blocks that provide legacy device functions: q Floppy Disk Controller (FDC) q Parallel Port q Serial Port 1 (SP1), UART Functionality for both Serial Port 1 and Serial Port 2 q Serial Port 2 (SP2), Infrared Functionality The description of each Legacy block includes the sections listed below. For details on the general implementation of each legacy block, see the SuperI/O Legacy Functional Blocks datasheet. q General Description q Register Map table(s) q Bitmap table(s). The register maps in this chapter use the following abbreviations for Type: q R/W = Read/Write q R = Read from a specific address returns the value of a specific register. Write to the same address is to a different register. q W=Write q RO = Read Only q R/W1C = Read/Write 1 to Clear. Writing 1 to a bit clears it to 0. Writing 0 has no effect. 8.1 FLOPPY DISK CONTROLLER (FDC) 8.1.1 General Description The generic FDC is a standard FDC with a digital data separator, and is DP8473 and N82077 software compatible. The FDC is implemented in this device as follows: q FM and MFM modes are supported. To select either mode, set bit 6 of the first command byte when writing to/read- ing from a diskette, where: 0 = FM mode 1 = MFM mode q Automatic media sense is supported by MSEN1-0 pins only on FDC signals routed to the PPM functional block (on the Parallel Port). q DRATE1 is not supported. q A logic 1 is returned for all floating (TRI-STATE) FDC register bits upon LPC I/O read cycles. 8.1.2 FDC Register Map Offset Mnemonic Register Name Type 00h SRA Status A RO 01h SRB Status B RO 02h DOR Digital Output R/W 03h TDR Tape Drive R/W 04h MSR Main Status R DSR Data Rate Select W 05h FIFO Data (FIFO) R/W 06h Reserved 07h DIR Digital Input R CCR Configuration Control W |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
