FDC37C672 查看數據表（PDF） - SMSC -> Microchip
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FDC37C672 Datasheet PDF : 173 Pages
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NAME
FDD0
Default = 0x00
on Vcc POR or
Reset_Drv
FDD1
Enhanced Super I/O Controller with Fast IR
Datasheet
REG INDEX
0xF4 R/W
0xF5 R/W
DEFINITION
Bits[1:0] Drive Type Select: DT1, DT0
Bits[2] Read as 0 (read only)
Bits[4:3] Data Rate Table Select: DRT1, DRT0
Bits[5] Read as 0 (read only)
Bits[6] Precompensation Disable PTS
=0 Use Precompensation
=1 No Precompensation
Bits[7] Read as 0 (read only)
Refer to definition and default for 0xF4
STATE
C
C
Table 19.8 - Parallel Port, Logical Device 3 [Logical Device Number = 0x03]
NAME
PP Mode Register
Default = 0x3C
on Vcc POR or
Reset_Drv
REG INDEX
0xF0 R/W
DEFINITION
Bits[2:0] Parallel Port Mode
= 100 Printer Mode (default)
= 000 Standard and Bi-directional (SPP) Mode
= 001 EPP-1.9 and SPP Mode
= 101 EPP-1.7 and SPP Mode
= 010 ECP Mode
= 011 ECP and EPP-1.9 Mode
= 111 ECP and EPP-1.7 Mode
STATE
C
Bit[6:3] ECP FIFO Threshold
0111b (default)
Bit[7] PP Interrupt Type
Not valid when the parallel port is in the Printer Mode
(100) or the Standard & Bi-directional Mode (000).
= 1 Pulsed Low, released to high-Z.
= 0 IRQ follows nACK when parallel port in EPP Mode or
[Printer,SPP, EPP] under ECP.
PP Mode Register 2
Default = 0x00
on Vcc POR or
Reset_Drv
0xF1 R/W
IRQ level type when the parallel port is in ECP, TEST, or
Centronics FIFO Mode.
Bits[1:0] PPFDC - muxed PP/FDC control
= 00 Normal Parallel Port Mode
= 01 PPFD1: Drive 0 is on the FDC pins
Drive 1 is on the Parallel port pins
Drive 2 is on the FDC pins
Drive 3 is on the FDC pins
= 10 PPFD2: Drive 0 is on the Parallel port pins
Drive 1 is on the Parallel port pins
Drive 2 is on the FDC pins
Drive 3 is on the FDC pins
Bits[7:2] Reserved. Set to zero.
SMSC FDC37C672
Page 134
DATASHEET
Rev. 10-29-03
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