NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 147

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

12.3 Status Register
The status register is an 8-bit, read-only register at I/O address 64H (Default, PnP programmable I/O address
LD5-CR62 and LD5-CR63) that holds information about the status of the keyboard controller and interface. It may
be read at any time.
12.4 Commands
BIT
0
1
2
3
4
5
6
7
COMMAND
Output Buffer Full
Input Buffer Full
System Flag
Command/Data
Inhibit Switch
Auxiliary Device Output Buffer
General Purpose Time-out
Parity Error
20h
BIT FUNCTION
Read Command Byte of Keyboard Controller
Table 12-1 Bit Map of Status Register
Table 12-2 KBC Command Sets
0: Output buffer empty
1: Output buffer full
0: Input buffer empty
1: Input buffer full
This bit may be set to 0 or 1 by writing to the system
flag bit in the command byte of the keyboard
controller. It defaults to 0 after a power-on reset.
0: Data byte
1: Command byte
0: Keyboard is inhibited
1: Keyboard is not inhibited
0: Auxiliary device output buffer empty
1: Auxiliary device output buffer full
0: No time-out error
1: Time-out error
0: Odd parity
1: Even parity (error)
FUNCTION
-138-
W83627UHG/NCT6627UD
DESCRIPTION
Publication Release Date: October 26, 2010
Revision 1.7