W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 109

• 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

(20) Invalid
9.3
There are several status, data, and control registers in the W83627UHG. These registers are defined
below, and the rest of this section provides more detail about each one of them.
9.3.1
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:
Command
Result
Command
Result
DEFAULT
BIT
NAME
PHASE
PHASE
BIT
Register Descriptions
base address + 0
base address + 1
base address + 2
base address + 3
base address + 4
base address + 5
base address + 7
ADDRESS
Status Register A (SA Register) (Read base address + 0)
OFFSET
PENDING
R/W
R/W
W
W
W
R
R
INIT
7
0
0
0
D7
D7
DRV 2#
------------- Invalid Codes -----------------
---------------- ST3 -------------------------
6
0
-------------------- ST0 ----------------------
0
0
D6
D6
0
0
D5
D5
Table 9-2 FDC Registers
DT (FIFO) REGISTER
STEP
NA
5
SB REGISTER
MS REGISTER
SA REGISTER
TD REGISTER
DI REGISTER
D4
D4
0
0
READ
0
0
D3
D3
TRAK0#
DESCRIPTION
-98-
HDS DS1 DS0
4
1
D2
D2
1
D1
D1
0
HEAD
REGISTER
NA
3
D0
D0
0
INDEX#
Invalid codes (no operation-
FDC goes to standby state)
ST0 = 80H
Command Code
Status information about
disk drive
DT (FIFO) REGISTER
2
1
DO REGISTER
DR REGISTER
CC REGISTER
TD REGISTER
W83627UHG
WRITE
REMARKS
WP#
REMARKS
1
1
DIR
NA
0