FDC37C935-QS Standard Microsystems (SMSC), FDC37C935-QS Datasheet - Page 145

• Manufacturer Part Number: FDC37C935-QS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C935-QS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Logical
Registers [0x30-0xFF]
Used to access the registers that are assigned
to each logical unit. This chip supports nine
logical units and has nine sets of logical device
registers. The nine logical devices are Floppy,
IDE1, IDE2, Parallel, Serial 1 and Serial 2, Real
Time
Auxiliary_I/O. A separate set (bank) of control
and configuration registers exists for each
Activate
Default = 0x00
Logical Device Control
Logical Device Control
Mem Base Addr
I/O Base Addr.
(see Device Base I/O
Address Table)
Default = 0x00
LOGICAL DEVICE
REGISTER
Clock,
Note1
Device
Keyboard
Configuration/Control
(0x40-0x5F)
(0x60-0x6F)
(0x31-0x37)
(0x38-0x3f)
0x60,2,... =
0x61,3,... =
ADDRESS
addr[15:8]
addr[7:0]
Controller,
(0x30)
Table 63 - Logical Device Registers
Bits[7:1] Reserved, set to zero.
Bit[0]
= 0 Logical device currently selected is
Reserved - Writes are ignored, reads return
0.
Vendor Defined - Reserved - Writes are
ignored, reads return 0.
Reserved - Writes are ignored, reads return
0.
All logical devices contain 0x60, 0x61. IDE1 and
IDE2, (Logical Devices 0x01 and 0x02 respectively)
contain 0x60 - 0x63 since the IDE registers are split
and two base addresses are required. In the case of
IDE [0x60,0x61] are used to set the I/O base of the
TASK FILE registers and [0x62,0x63] are used to set
the
register
0x63 to support GPA on base address defined by
0x60:0x61 and GPW on a base address defined by
0x62:0x63. Unused registers will ignore writes and
return zero when read.
= 1 Activates the logical device currently
and
I/O
145
Note2
selected through the Logical Device
# register.
inactive
base
.
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 0x08 contains 0x60 -
DESCRIPTION
of
the
MISCELLANEOUS
AT
STATE
C
C
C
C
C