W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 34

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.1
To program the W83627UHG configuration registers, the following configuration procedures must be
followed in sequence:
(1). Enter the Extended Function Mode.
(2). Configure the configuration registers.
(3). Exit the Extended Function Mode.
6.1.1
To place the chip into the Extended Function Mode, two successive writes of 0x87 must be applied to
Extended Function Enable Registers (EFERs, i.e. 2Eh or 4Eh).
Configuration Sequence
Enter the Extended Function Mode
N
N
N
N
N
N
Wait for key string
Wait for key string
Wait for key string
Wait for key string
Power-on Reset
Power-on Reset
Power-on Reset
Power-on Reset
Extended Function
Extended Function
Check Pass key
Check Pass key
Check Pass key
Check Pass key
Figure 6-2 Configuration Register
Is the data
Is the data
Is the data
Is the data
Is the data
Is the data
“87h”?
“87h”?
“87h”?
“87h”?
“87h”?
“87h”?
Mode
Mode
I/O Write to 2Eh
I/O Write to 2Eh
I/O Write to 2Eh
I/O Write to 2Eh
Y
Y
Y
Y
I/O Write to 2Eh
I/O Write to 2Eh
I/O Write to 2Eh
I/O Write to 2Eh
Y
Y
Y
Y
-23-
Any other I/O transition cycle
Any other I/O transition cycle
Any other I/O transition cycle
Any other I/O transition cycle
Publication Release Date: May 25, 2007
W83627UHG
Revision 1.0