FDC37B782-NS Standard Microsystems (SMSC), FDC37B782-NS Datasheet - Page 176

• Manufacturer Part Number: FDC37B782-NS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37B782-NS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Logical Device Configuration/Control Registers [0x30-0xFF]
Used to access the registers that are assigned to each logical unit. This chip supports eight logical units
and has eight sets of logical device registers. The eight logical devices are Floppy, Parallel Port, Serial
Port 1 and Serial Port 2, Real Time Clock, Keyboard Controller, Auxiliary I/O and ACPI. A separate set
(bank) of control and configuration register exists for each logical device and is selected with the Logical
Device # Register (0x07).
The INDEX PORT is used to select a specific logical device register. These registers are then accessed
through the DATA PORT.
The Logical Device registers are accessible only when the device is in the Configuration State. The logical
register addresses are:
Logical Device Registers
Activate
Default = 0x00
on Vcc POR or
Reset_Drv
Logical Device
Control
Logical Device
Control
Mem Base Addr
I/O Base Addr.
(see Device Base I/O
Address Table)
Default = 0x00
on Vcc POR or
Reset_Drv
Interrupt Select
Defaults :
0x70 = 0x00,
on Vcc POR or
Reset_Drv
0x72 = 0x00,
on Vcc POR or
Reset_Drv
LOGICAL DEVICE
REGISTER
Note1
Note 2
(0x31-0x37)
(0x40-0x5F)
(0x60-0x6F)
(0x38-0x3f)
ADDRESS
0x60,2,... =
0x61,3,... =
(0x70,072)
addr[15:8]
addr[7:0]
(0x30)
TABLE 72 - CHIP LEVEL REGISTERS
Bits[7:1] Reserved, set to zero.
Bit[0]
through the Logical Device # register.
= 0 Logical device currently selected is inactive
Reserved - Writes are ignored, reads return 0.
Vendor Defined - Reserved - Writes are ignored,
reads return 0.
Reserved - Writes are ignored, reads return 0.
Registers 0x60 and 0x61 set the base address for the
device. If more than one base address is required,
the second base address is set by registers 0x62 and
0x63.
Unused registers will ignore writes and return zero
when read.
0x70 is implemented for each logical device. Refer to
Interrupt Configuration Register description. Only the
keyboard controller uses Interrupt Select register
0x72. Unused register (0x72) will ignore writes and
return zero when read. Interrupts default to edge high
(ISA compatible).
= 1 Activates the logical device currently selected
179
DESCRIPTION
STATE
C
C
C
C
C
C