W83627DHG Nuvoton Technology Corporation of America, W83627DHG Datasheet - Page 136

• Manufacturer Part Number: W83627DHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627DHG

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

10.2 Register Descriptions
There are several status, data, and control registers in the W83627DHG. These registers are defined
below, and the rest of this section provides more details about each one of them.
10.2.1 Status Register A (SA Register) (Read base address + 0)
Along with the SB register, the SA register is used to monitor several disk-interface pins in PS/2 and
Model 30 modes. In PS/2 mode, the bit definitions for this register are as follows:
INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.
RESERVED (Bit 6)
STEP (Bit 5):
This bit indicates the complement of the STEP# output.
TRAK0#(Bit 4):
This bit indicates the value of the TRAK0# input.
HEAD (Bit 3):
This bit indicates the complement of the HEAD# output.
0
1
side 0
side 1
base address + 0
base address + 1
base address + 2
base address + 3
base address + 4
base address + 5
base address + 7
ADDRESS
OFFSET
7
6
5
DT (FIFO) REGISTER
SB REGISTER
4
MS REGISTER
SA REGISTER
TD REGISTER
DI REGISTER
3
READ
2
-124-
1
0
REGISTER
DIR
INDEX#
WP#
HEAD
TRAK0#
STEP
INIT PENDING
DRV2#
Publication Release Date: Aug, 22, 2007
DT (FIFO) REGISTER
DO REGISTER
DR REGISTER
CC REGISTER
TD REGISTER
W83627DHG
WRITE
Version 1.4