SST79LF008 Datasheet, PDF (206/252 Pages) Silicon Storage Technology, Inc – Mobile Platform Controller plus 8 Mbit LPC Firmware Flash

Advance Information
Mobile Platform Controller
8 Mbit LPC Firmware Flash
SST79LF008
18.2.2 Keyboard Status Register (KBCSTS)
Location
7
Read
UD
7FF2H
Write
Reset
0
6
5
4
3
2
1
UD
AUXOBF/
UD
C/D
UD
IBF
UD
-
-
0
0
0
0
0
0
0
OBF
-
0
Symbol
-
UD
AUXOBF/UD
IBF
OBF
Function
Not implemented
User defined bits. Can be written/read by the 8051 core.
Auxiliary Output Buffer Full flag (if AUXSEL=1) or User defined bit (if AUXSEL=0)
If AUXSEL=1 in KBDCFG register this read only bit is controlled by hardware as
follows:
Set to ‘1’ when 8051 writes into the AUXDATA register at 7FFAH
Cleared to ‘0’ when 8051 writes into the KBCDATA register at 7FF1H
C/D Command/Data flag (read only)
Set to ‘1’ when the LPC Host writes command byte to port 64H
Cleared to ‘0’ when the LPC Host writes data byte to port 60H
Input Buffer Full flag (read only)
Set when the LPC Host writes data or command to port 60H or 64H
Cleared when the 8051 core reads KBCDATA register at address 7FF1H
Interrupt request KCIBF to 8051 is asserted when this bit is set
Output Buffer Full flag (read only)
Set when the 8051 core writes into KBCDATA register at address 7FF1H or into
AUXDATA register at address 7FFAH
Cleared when the LPC Host reads port 60H
Interrupt request KCOBE to 8051 is asserted when this bit is cleared
18.2.3 Keyboard Auxiliary Data Register (AUXDATA)
Location
7FFAH
Read
Write
Reset
7
6
5
4
3
2
1
AUXDATA AUXDATA AUXDATA AUXDATA AUXDATA AUXDATA AUXDATA
_7
_6
_5
_4
_3
_2
_1
0
0
0
0
0
0
0
0
AUXDATA
_0
0
Symbol
AUXDATA[7:0]
Function
When the 8051 core reads from this register the data returned is the last 8051
written data.
The 8051 core writes to this register the data byte from Mouse/Auxiliary Device
which will be returned to the LPC Host on the next read from port 60H. The OBF
bit in the status register is set, and the internal MOBF signal is asserted, when the
8051 core writes to this register. See Table 18-2.
©2006 Silicon Storage Technology, Inc.
206
S71320-01-000
10/06