FDC37C665IR SMSC Corporation, FDC37C665IR Datasheet - Page 122

• Manufacturer Part Number: FDC37C665IR
• Description: 3/5 Volt Advanced High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controller with Infranred Support
• Manufacturer: SMSC Corporation

FDC37C665IR
Description
The configuration registers consist of seventeen
Configuration Registers 0-F. The configuration
select register is written to by writing to port
3F0H.
accessed by reading or writing to port 3F1H.
Configuration Select Register (CSR)
This register can only be accessed when the
FDC is in the Configuration Mode.
registers, the Configuration Select Register and
Default
66/65H
DCH
FFH
TBD
TBD
3BH
9FH
78H
00H
00H
00H
00H
00H
00H
01H
00H
The Configuration Registers 0-F are
CRC
CRD
CRA
CRB
CRE
CRF
CR0
CR1
CR2
CR3
CR4
CR5
CR6
CR7
CR8
CR9
UART2 PWR
(RESERVED
(RESERVED
LOCK CRx
DRV2 EN/
PINTR
VALID
ADRx/
ADR7
Configuration
DB7
Floppy Drive D
UART Speed
0
1
)
)
FDD3
Table 48 - FDC37C665IR Configuration Registers
Auto Power Management
EPP Type
UART2
IDENT
EXTx4
ADR6
DB6
COM3, 4 ADDR
EN
RESERVED
1
0
OSC
RESERVED
DRV 0X1
MIDI 2
ADR5
UART2 ADDRESS
MFM
DB5
Register
Floppy Drive C
1
0
FDD2
This
UART2 IR Mode
IRQ POL
FDC EN
TEST MODES - RESERVED
MIDI 1
ADR4
DB4
DRIVE OPTIONS
122
0
0
DEN SEL
register, located at port 3F0H, must be
initialized upon entering the Configuration Mode
before the configuration registers (CR0-CRF)
can be accessed and is used to select which of
the Configuration Registers are to be accessed
at port 3F1H.
Configuration Registers 0-F
These registers are set to their default values at
power up and are not affected by RESET. They
are accessed at port 3F1H.
following descriptions for the function of each
configuration register.
UART1 PWR
FDC PWR
PP MODE
ADR3
DB3
Parallel Port FDC
Media ID Polarity
0
0
Floppy Drive B
FDD1
(RESERVED)
DMA MODE
UART1 EN
ECP FIFO THRESHOLD
PP PWR
DUPLEX
ADR10
PINTR
ADR2
DB2
1
0
ENHANCED
FDC MODE
IDE AT/XT
IDE SEC
Parallel Port Address
ADR1
ADR9
XMIT
DB1
UART1 ADDRESS
1/0
Floppy Boot Drive
PP EXT MODES
2
1
Floppy Drive A
FDD0
Refer to the
(RESERVED
FDC SEC
IDE EN
ADR0
ADR8
RCV
DB0
0/1
0
)