LPC47M182 SMSC Corporation, LPC47M182 Datasheet - Page 177

• Manufacturer Part Number: LPC47M182
• Description: ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC
• Manufacturer: SMSC Corporation

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
Note 1:
11.3
SMSC LPC47M182
To allow the selection of the configuration address to a user defined location, these Configuration Address
Bytes are used. There is no restriction on the address chosen, except that A0 is 0, that is, the address
must be on an even byte boundary. As soon as both bytes are changed, the configuration space is moved
to the specified location with no delay (Note: Write byte 0, then byte 1; writing CR27 changes the base
address).
Logical Device Configuration/Control Registers [0x30-0xFF]
These registers are used to access the registers that are assigned to each logical device. The logical
devices are Floppy, Parallel, Serial Port, Keyboard Controller, Power Control and GPIO. A separate set
(bank) of control and configuration registers 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 shown in the table below.
TEST 3
Default = 0x00, on
VCC POR and
VTR POR
Activate
Default = 0x00
on VCC POR, VTR
POR, HARD RESET and
SOFT RESET
Logical Device Control
Logical Device Control
Memory Base Address
LOGICAL DEVICE
REGISTER
REGISTER
ADDRESS
CHIP (GLOBAL) CONTROL REGISTERS
0x2F R/W
Table 11.4 – Logical Device Registers
(0x31-0x37)
(0x38-0x3F)
(0x40-0x5F)
ADDRESS
DATASHEET
(0x30)
Test Modes: Reserved for SMSC. Users should not
write to this register, may produce undesired results.
177
Bits[7:1] Reserved, set to zero.
Bit[0]
selected through the Logical Device # register.
= 0
inactive
Note:
powered up according to the following equation
unless otherwise specified:
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.
Reserved – Writes are ignored, reads return 0.
Vendor Defined - Reserved - Writes are
ignored, reads return 0.
Reserved – Writes are ignored, reads return 0.
= 1
Activates the logical device currently
Logical device currently selected is
A logical device will be active and
DESCRIPTION
Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)
DESCRIPTION