W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 111

• 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

Along with the SA register, the SB 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:
In PS/2 Model 30 mode, the bit definitions for this register are as follows:
DEFAULT
DEFAULT
9.2.2 Status Register B (SB Register) (Read base address + 1)
NAME
BIT
BIT
BIT
NAME
0
7
6
5
4
3
2
1
0
7
6
5
4
3
BIT
BIT
1: The disk is write-protected.
DIR#. Indicates the direction of the head movement.
0: Inward direction.
1: Outward direction.
1
1
Drive SEL0. Indicates the status of the DO Register, bit 0 (drive-select bit 0).
WDATA Toggle. Changes state on every rising edge of the WD# output pin.
RDATA Toggle. Changes state on every rising edge of the RDATA# output pin.
WE. Indicates the complement of the WE# output pin.
MOT EN B. Indicates the complement of the MOB# output pin.
MOT EN A. Indicates the complement of the MOA# output pin.
DRV 2#.
0: A second drive has been installed.
1: No second drive is installed.
Reserved.
DSA#. Indicates the status of the DSA# output pin.
WD F/F. Indicates the complement of the WD# output pin, which is latched on every rising
edge of the WD# output pin.
RDATA F/F. Indicates the complement of the latched RDATA# output pin.
DRV 2#
7
0
7
1
RESERVED.
6
1
6
1
Drive
SEL0
DSA#
5
0
5
1
DESCRIPTION
DESCRIPTION
DESCRIPTION
Toggle
-96-
WDTA
WD F/F
4
0
4
0
Toggle
RDTA
RDATA
3
0
F/F
Publication Release Date: March 24, 2008
3
0
WE F/F
WE
2
0
2
0
W83627UHG
MOT EN
DSD#
B
1
0
1
1
Revision 1.44
MOT EN
DSC#
0
A
0
0
1