LPC47M182-NR SMSC [SMSC Corporation], LPC47M182-NR Datasheet - Page 168
LPC47M182-NR
Manufacturer Part Number
LPC47M182-NR
Description
ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.LPC47M182-NR.pdf
(223 pages)
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11.1.4 CONFIGURATION SEQUENCE
To program the configuration registers, the following sequence must be followed:
11.1.5 Enter Configuration Mode
11.1.6 Configuration Mode
Note:
11.1.7 Exit Configuration Mode
Note:
Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)
1. Enter Configuration Mode
2. Configure the Configuration Registers
3. Exit Configuration Mode.
To place the chip into the Configuration State the Config Key is sent to the chip’s CONFIG PORT. The config key
consists of 0x55 written to the CONFIG PORT. Once the configuration key is received correctly the chip enters into
the Configuration State (The auto Config ports are enabled).
The system sets the logical device information and activates desired logical devices through the INDEX and DATA
ports. In configuration mode, the INDEX PORT is located at the CONFIG PORT address and the DATA PORT is at
INDEX PORT address + 1.
The desired configuration registers are accessed in two steps:
If accessing the Global Configuration Registers, step (a) is not required.
To exit the Configuration State the system writes 0xAA to the CONFIG PORT. The chip returns to the RUN State.
Only two states are defined (Run and Configuration). In the Run State the chip will always be ready to enter the
Configuration State.
a)
b)
Write the index of the Logical Device Number Configuration Register (i.e., 0x00 for FDC) to the INDEX
PORT and then write the number of the desired logical device to the DATA PORT
Write the address of the desired configuration register within the logical device to the INDEX PORT and
then write or read the configuration register through the DATA PORT.
DATASHEET
168
SMSC LPC47M182
Datasheet
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