LPC47M14G-NC Просмотр технического описания (PDF) - SMSC -> Microchip
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LPC47M14G-NC
SMSC -> Microchip
LPC47M14G-NC Datasheet PDF : 205 Pages
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Table 6 – Internal 2 Drive Decode - Drives 0 and 1 Swapped
DIGITAL OUTPUT REGISTER
Bit 7 Bit 6 Bit 5 Bit 4 Bit1 Bit 0
X
X
X
1
0
0
X
X
1
X
0
1
X
1
X
X
1
0
1
X
X
X
1
1
0
0
0
0
X
X
DRIVE SELECT OUTPUTS
(ACTIVE LOW)
nDS1
nDS0
0
1
1
0
1
1
1
1
1
1
MOTOR ON OUTPUTS
(ACTIVE LOW)
nMTR1
nMTR0
nBIT 4
nBIT 5
nBIT 4
nBIT 5
nBIT 4
nBIT 5
nBIT 4
nBIT 5
nBIT 4
nBIT 5
Normal Floppy Mode
Normal mode. Register 3F3 contains only bits 0 and 1. When this register is read, bits 2 - 7 are ‘0’.
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
REG 3F3
0
0
0
0
0
0
tape sel1 tape sel0
Enhanced Floppy Mode 2 (OS2)
Register 3F3 for Enhanced Floppy Mode 2 operation.
DB7
DB6
REG 3F3 Reserved Reserved
DB5
DB4
Drive Type ID
DB3
DB2
DB1
DB0
Floppy Boot Drive tape sel1 tape sel0
Table 7 – Drive Type ID
DIGITAL OUTPUT REGISTER
Bit 1
Bit 0
0
0
0
1
1
0
1
1
REGISTER 3F3 - DRIVE TYPE ID
Bit 5
Bit 4
L0-CRF2 - B1
L0-CRF2 - B0
L0-CRF2 - B3
L0-CRF2 - B2
L0-CRF2 - B5
L0-CRF2 - B4
L0-CRF2 - B7
L0-CRF2 - B6
Note: L0-CRF2-Bx = Logical Device 0, Configuration Register F2, Bit x.
SMSC DS – LPC47M14X
Page 31
Rev. 03/19/2001
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