FDC37M81 View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

FDC37M81

PC98/99 Compliant Enhanced Super I/O Controller with Keyboard/Mouse Wake-Up

SMSC -> Microchip 

DRIVE RATE

DRT1 DRT0

0

0

0

0

0

0

0

0

0

1

0

1

0

1

0

1

1

0

1

0

1

0

1

0

Table 9 - Data Rates

DATA RATE

DATA RATE

SEL1 SEL0 MFM FM

1

1

1Meg

---

0

0

500

250

0

1

300

150

1

0

250

125

1

1

1Meg

---

0

0

500

250

0

1

500

250

1

0

250

125

1

1

1Meg

---

0

0

500

250

0

1

2Meg

---

1

0

250

125

DENSEL

1

1

0

0

1

1

0

0

1

1

0

0

DRATE(1)

1

0

1

1

0

0

0

1

1

0

1

1

0

0

0

1

1

0

1

1

0

0

0

1

1

0

Drive Rate Table (Recommended) 00 = 360K, 1.2M, 720K, 1.44M and 2.88M Vertical Format

01 = 3-Mode Drive

10 = 2 Meg Tape

Note 1: The DRATE and DENSEL values are mapped onto the DRVDEN pins.

DT1 DT0

0

0

1

0

0

1

1

1

Table 10 - DRVDEN Mapping

DRVDEN1 (1) DRVDEN0 (1)

DRIVE TYPE

DRATE0

DENSEL

4/2/1 MB 3.5"

2/1 MB 5.25" FDDS

2/1.6/1 MB 3.5" (3-MODE)

DRATE0

DRATE1

DRATE0

nDENSEL PS/2

DRATE1

DRATE0

25

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