Legacy-Free Keyboard/Embedded Controller with SPI and LPC Docking Interface
The 8051 SETB bit and CLR bit instructions are utilized to directly access SGPIO bits where bit =
address + bit.
SGPI0_DIR REG
SGPIO OUT REG
SGPIO PIN
NOTE: SGPIO IN AND OUT
REGISTER SHARE THE
SAME 8051 ADDRESS
SGPIO IN REG
Figure 20.3 SGPIO Pin Block Diagram
Note: This figure is for illustration purposes only and is not intended to suggest specific implementation
details.
Table 20.32 SGPIO Input/Output Register J
N/A
HOST ADDRESS
8051 ADDRESS
POWER
SFR 0x80
VCC1
0x00
DEFAULT
BIT
D7
D6
D5
D4
D3
R/W
D2
R/W
D1
R/W
D0
R/W
R
R
R
R
HOST TYPE
BIT NAME
Reserved
Reserved Reserved Reserved SGPIO33 SGPIO32 SGPIO31 SGPIO30
Revision 1.1 (01-14-03)
236
SMSC LPC47N350
DATASHEET
SMSC [ SMSC CORPORATION ]
