Enhanced Super I/O Controller with Fast IR
Datasheet
Table of Contents
FDC37C672 Datasheet Revision History .................................................................................................. 3
Chapter 1
Chapter 2
Chapter 3
3.1
General Description................................................................................................................ 9
Pin Configuration.................................................................................................................. 10
Description of Pin Functions ................................................................................................ 12
Buffer Type Descriptions ............................................................................................................................14
Chapter 4
Chapter 5
5.1
5.2
Description of Multifunction Pins .......................................................................................... 15
Functional Description.......................................................................................................... 17
Super I/O Registers....................................................................................................................................17
Host Processor Interface............................................................................................................................17
Chapter 6
Floppy Disk Controller .......................................................................................................... 18
6.1
FDC Internal Registers...............................................................................................................................18
6.1.1
Status Register A (SRA) .....................................................................................................................19
6.1.2
Status Register B (SRB) .....................................................................................................................21
6.1.3
Digital Output Register (DOR).............................................................................................................23
6.1.4
Tape Drive Register (TDR) .................................................................................................................24
6.1.5
Data Rate Select Register (DSR)........................................................................................................26
6.1.6
Main Status Register...........................................................................................................................29
6.1.7
Data Register (FIFO)...........................................................................................................................29
6.1.8
Digital Input Register (DIR) .................................................................................................................31
6.1.9
Configuration Control Register (CCR).................................................................................................33
6.1.10
Status Register Encoding ................................................................................................................34
6.2
RESET .......................................................................................................................................................36
6.2.1
RESET Pin (Hardware Reset).............................................................................................................36
6.2.2
DOR Reset vs. DSR Reset (Software Reset) .....................................................................................36
6.3
Modes of Operation....................................................................................................................................36
6.3.1
PC/AT mode - (IDENT high, MFM a "don't care") ...............................................................................36
6.3.2
PS/2 mode - (IDENT low, MFM high)..................................................................................................36
6.3.3
Model 30 mode - (IDENT low, MFM low) ............................................................................................36
6.4
DMA Transfers ...........................................................................................................................................37
6.5
Controller Phases.......................................................................................................................................37
6.5.1
Command Phase ................................................................................................................................37
6.5.2
Execution Phase .................................................................................................................................37
6.5.3
Data Transfer Termination ..................................................................................................................38
6.5.4
Result Phase.......................................................................................................................................39
Chapter 7
Chapter 8
Command Set/Descriptions ................................................................................................. 40
Instruction Set ...................................................................................................................... 43
8.1
Data Transfer Commands ..........................................................................................................................49
8.1.1
Read Data ...........................................................................................................................................49
8.1.2
Read Deleted Data..............................................................................................................................51
8.1.3
Read A Track ......................................................................................................................................51
8.1.4
Write Data ...........................................................................................................................................52
8.1.5
Write Deleted Data..............................................................................................................................53
8.1.6
Verify...................................................................................................................................................53
8.1.7
Format A Track ...................................................................................................................................54
8.2
Control Commands ....................................................................................................................................55
8.2.1
Read ID...............................................................................................................................................55
8.2.2
Recalibrate ..........................................................................................................................................55
8.2.3
Seek....................................................................................................................................................56
8.2.4
Sense Interrupt Status ........................................................................................................................56
8.2.5
Sense Drive Status .............................................................................................................................57
8.2.6
Specify ................................................................................................................................................57
8.2.7
Configure ............................................................................................................................................58
8.2.8
Version................................................................................................................................................59
8.2.9
Relative Seek ......................................................................................................................................59
8.2.10
Perpendicular Mode ........................................................................................................................60
8.3
LOCK .........................................................................................................................................................61
SMSC FDC37C672
Page 4
Rev. 10-29-03
DATASHEET
SMSC [ SMSC CORPORATION ]
