LPC47M142-NC Standard Microsystems (SMSC), LPC47M142-NC Datasheet - Page 31

• Manufacturer Part Number: LPC47M142-NC
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LPC47M142-NC

• Lead Free Status / RoHS Status: Not Compliant

Normal Floppy Mode
Normal mode. Register 3F3 contains only bits 0 and 1. When this register is read, bits 2 - 7 are ‘0’.
Enhanced Floppy Mode 2 (OS2)
Register 3F3 for Enhanced Floppy Mode 2 operation.
SMSC DS – LPC47M14X
Bit 7
REG 3F3
REG 3F3 Reserved Reserved
X
X
X
1
0
DIGITAL OUTPUT REGISTER
Bit 6
X
X
X
1
0
Note:
DIGITAL OUTPUT REGISTER
DB7
DB7
Bit 5
0
X
X
X
1
0
Bit 1
Table 6 – Internal 2 Drive Decode - Drives 0 and 1 Swapped
0
0
1
1
L0-CRF2-Bx = Logical Device 0, Configuration Register F2, Bit x.
Bit 4
X
X
X
1
0
DB6
DB6
0
Bit1
X
0
0
1
1
Bit 0
0
1
0
1
DB5
DB5
Bit 0
Table 7 – Drive Type ID
Drive Type ID
0
X
0
1
0
1
DRIVE SELECT OUTPUTS
nDS1
Page 31
DB4
DB4
1
0
1
1
1
0
(ACTIVE LOW)
L0-CRF2 - B1
L0-CRF2 - B3
L0-CRF2 - B5
L0-CRF2 - B7
REGISTER 3F3 - DRIVE TYPE ID
Bit 5
Floppy Boot Drive
DB3
DB3
0
nDS0
1
0
1
1
1
DB2
DB2
0
L0-CRF2 - B0
L0-CRF2 - B2
L0-CRF2 - B4
L0-CRF2 - B6
MOTOR ON OUTPUTS
nMTR1
nBIT 4
nBIT 4
nBIT 4
nBIT 4
nBIT 4
Bit 4
(ACTIVE LOW)
tape sel1
tape sel1
DB1
DB1
nMTR0
nBIT 5
nBIT 5
nBIT 5
nBIT 5
nBIT 5
tape sel0
tape sel0
DB0
DB0
Rev. 03/19/2001