FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 125

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

CR05
This register can only be accessed in the
Configuration Mode and the CSR has been
CR06
This register can only be accessed in the
Configuration Mode and after the CSR has
been initialized to 06H.
BIT NO.
0,1
4,3
2
5
6
7
Reserved
FDC DMA Mode
DenSel
Swap Drv 0,1
EXTx4
Reserved
Table 52 - CR05- Floppy Disk and IDE Extended Setup Register
BIT NAME
The default value
Read Only. A read returns a 0.
0=(default) Burst mode is enabled for the FDC FIFO execution
phase data transfers. 1=Non-Burst mode enabled. The FDRQ
and FIRQ pins are strobed once for each byte transferred while
the FIFO is enabled.
A high level on this bit, swaps drives and motor sel 0 and 1 of the
FDC. A low level on this bit does not (Default).
External 4 drive support: 0=Internal 2 drive decoder (default).
1=External 4 drive decoder (External 2 to 4 decoder required).
Read Only. A read of this bit returns a 0
Bit 4
0
0
1
1
125
initialized to 05H. The default value after power
up is 00H.
of this register after power up is FFH. This
register holds the floppy disk drive types for up
to four floppy disk drives.
DESCRIPTION
Bit 3
0
1
0
1
Densel output
Normal (Default)
Reserved
1
0