LPC47N227TQFP Standard Microsystems (SMSC), LPC47N227TQFP Datasheet - Page 146

• Manufacturer Part Number: LPC47N227TQFP
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LPC47N227TQFP

• Lead Free Status / RoHS Status: Not Compliant

CR06 can only be accessed in the configuration state and after the CSR has been initialized to 06H.
CR06 holds the floppy disk drive type IDs for up to four floppy disk drives (see Table 6 – Drive Type ID
in the Floppy Disk Controller).
CR07
CR07 can only be accessed in the configuration state and after the CSR has been initialized to 07H.
CR07 controls auto power management and the floppy boot drive.
BIT NO.
BIT NO.
0,1
2,3
0
1
2
3
4
5
6
7
4
5
6
Floppy Boot
Reserved
Parallel Port
Enable
UART 2 Enable
UART 1 Enable
Type: R/W
Type: R/W
BIT NAME
BIT NAME
ID00
ID01
ID10
ID11
ID20
ID21
ID30
ID31
Auto Power Management and Boot Drive Select
Floppy Disk Drive 0 type ID 0
Floppy Disk Drive 0 type ID 1
Floppy Disk Drive 1 type ID 0
Floppy Disk Drive 1 type ID 1
Floppy Disk Drive 2 type ID 0
Floppy Disk Drive 2 type ID 1
Floppy Disk Drive 3 type ID 0
Floppy Disk Drive 3 type ID 1
This bit is used to define the boot floppy.
0 = Drive A (default)
1 = Drive B
Read Only. A read returns 0.
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.
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.
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.
Drive Type ID Register
Table 63 – CR06
Table 64 – CR07
146
Bits[7:4] = 0000 on HARD RESET
DESCRIPTION
DESCRIPTION
Default: 0x00 on VCC POR;
Default: 0xFF on VCC POR