FDC37C669-MT Datasheet, PDF (125/162 Pages) Microchip Technology – PC 98/99 Compliant Super I/O Floppy Disk Controller

CR07
This register can only be accessed in the Configuration
Mode and after the CSR has been initialized to 07H.
The
default
value
of
this register after power up is 00H. This register holds the
value for the auto power management, and floppy boot
drive.
BIT NO.
0,1
2
3
4
5
6
7
BIT NAME
Table 53 - CR07
DESCRIPTION
Floppy Boot
This bit is used to define the boot floppy.
0 = Drive A (default)
1 = Drive B
Reserved Read as 0.
Reserved Read as 0.
Parallel Port
Enable
This bit controls the AUTOPOWER DOWN feature of the Parallel
Port. The function is:
0 = Auto powerdown disabled (default)
1 = Auto powerdown enabled
This bit is reset to the default state by POR or a hardware reset.
UART 2 Enable
This bit controls the AUTOPOWER DOWN feature of the UART2.
The function is:
0 = Auto powerdown disabled (default)
1 = Auto powerdown enabled
This bit is reset to the default state by POR or a hardware reset.
UART 1 Enable
This bit controls the AUTOPOWER DOWN feature of the UART1.
The function is:
0 = Auto powerdown disabled (default)
1 = Auto powerdown enabled
This bit is reset to the default state by POR or a hardware reset.
Floppy Disk
Enable
This bit controls the AUTOPOWER DOWN feature of the Floppy
Disk. The function is:
0 = Auto powerdown disabled (default)
1 = Auto powerdown enabled
This bit is reset to the default state by POR or a hardware reset.
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