FDC37B77X SMSC Corporation, FDC37B77X Datasheet - Page 142

• Manufacturer Part Number: FDC37B77X
• Description: ENHANCED SUPER I/O CONTROLLER WITH WAKE UP FEATURES
• Manufacturer: SMSC Corporation

Note 1: A logical device will be active and powered up according to the following equation:
Note 2: If the I/O Base Addr of the logical device is not within the Base I/O range as shown in the
Note 3: The Activate Register for Logical Device 5 (Serial Port 2) is reset by VTR POR only.
Interrupt Select
Defaults :
0x70 = 0x00,
on Vcc POR or
Reset_Drv
0x72 = 0x00,
on Vcc POR or
Reset_Drv
DMA Channel Select
Default = 0x04
on Vcc POR or
Reset_Drv
32-Bit Memory Space
Configuration
Logical Device
Logical Device
Configuration
Reserved
LOGICAL DEVICE
REGISTER
DEVICE ON (ACTIVE) = (Activate Bit SET or Pwr/Control Bit SET).
The Logical device's Activate Bit and its Pwr/Control Bit are linked such that setting or
clearing one sets or clears the other.
Logical Device I/O map, then read or write is not valid and is ignored.
(0xA9-0xDF)
(0xE0-0xFE)
(0x76-0xA8)
(0x70,0x72)
(0x71,0x73)
(0x74,0x75)
ADDRESS
0xFF
Table 55 - Logical Device Registers
0x70 is implemented for each logical device.
description.
uses Interrupt Select register 0x72. Unused
register (0x72) will ignore writes and return
zero when read. Interrupts default to edge
high (ISA compatible).
Reserved - not implemented. These register
locations ignore writes and return zero when
read.
Only 0x74 is implemented for FDC, Serial
Port 2 and Parallel port.
implemented and ignores writes and returns
zero when read.
Configuration.
Reserved - not implemented. These register
locations ignore writes and return zero when
read.
Reserved - not implemented. These register
locations ignore writes and return zero when
read.
Reserved - Vendor Defined (see SMSC
defined
Registers).
Reserved
Refer to Interrupt Configuration Register
142
Logical
Only the keyboard controller
DESCRIPTION
Refer to DMA Channel
Device
Configuration
0x75 is not
STATE
C
C
C
C
C