LPC47M112_07 datasheet(61/204 Pages) SMSC

61 / 204 page

Enhanced Super I/O Controller with LPC Interface

Datasheet

SMSC DS – LPC47M112

Page 61

Rev. 02-16-07

DATASHEET

their default values. A status byte is returned immediately after issuing a LOCK command. This byte reflects the value

of the LOCK bit set by the command byte.

ENHANCED DUMPREG

The DUMPREG command is designed to support system run-time diagnostics and application software development

and debug. To accommodate the LOCK command and the enhanced PERPENDICULAR MODE command the eighth

byte of the DUMPREG command has been modified to contain the additional data from these two commands.

COMPATIBILITY

The LPC47M112 was designed with software compatibility in mind. It is a fully backwards- compatible solution with the

older generation 765A/B disk controllers. The FDC also implements on-board registers for compatibility with the PS/2, as

well as PC/AT and PC/XT, floppy disk controller subsystems. After a hardware reset of the FDC, all registers, functions

and enhancements default to a PC/AT, PS/2 or PS/2 Model 30 compatible operating mode, depending on how the

IDENT and MFM bits are configured by the system BIOS.

LPC47M112 Datasheet(PDF) 61 Page - SMSC Corporation