FDC37C78-HT View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
FDC37C78-HT Datasheet PDF : 82 Pages
| |||
BIT NO.
0,1
2
3
4:6
7
BIT NAME
Floppy Boot
Media ID0
Polarity
Media ID1
Polarity
Reserved
Floppy Disk
Enable
Table 40 - CR07
DESCRIPTION
This bit is used to define the boot floppy.
0 = Drive A (default)
1 = Drive B
0 = Non-invert
1 = Invert
0 = Non-invert
1 = Invert
Read as 0.
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.
CR08
This register can only be accessed in the Configuration Mode and after the CSR has been initialized to
08H. The default value of this register after power up is 00H. This register is read only.
CR09
This register can only be accessed in the Configuration Mode and after the CSR has been initialized to
09H. The default value of this register after power up is 00H. This register is read only.
CR0A
This register can only be accessed in the Configuration Mode and after the CSR has been initialized to
0AH. The default value of this register after power up is 00H. This register is read only.
CR0B
This register can only be ac1cessed in the Configuration Mode and after the CSR has been initialized
to 0BH. The default value of this register after power up is 00H. This register indicates the data rate
table used for each drive. Refer to CR1F for Drive Type register.
FDD3
D7
D6
DRT1
DRT0
Table 41 - CR0B
FDD2
FDD1
D5
D4
D3
D2
DRT1
DRT0
DRT1
DRT0
FDD0
D1
D0
DRT1
DRT0
CR0C
This register can only be accessed in the Configuration Mode and after the CSR has been initialized to
0CH. The default value of this register after power up is 00H. This register is reserved.
68
Share Link: 