Legacy-Free Keyboard/Embedded Controller with SPI and LPC Docking Interface
21.3
Multiplexing_1 Register - MISC[7:0]
Table 21.2 Multiplexing_1 Register
N/A
HOST
ADDRESS
0x7F3D
8051
ADDRESS
VCC1
0x00
POWER
DEFAULT
BIT
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
-
-
-
-
-
HOST TYPE
8051 TYPE
BIT NAME
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
MISC7
MISC6
Reserved MISC4
MISC3
MISC2
MISC1
MISC0
MISC7 – LPC/8051 (SEE Note 20.6)
D7
The MISC7 bit is used in to select the pin function and the buffer mode between GPIO8 – GPIO9 and
RXD/TXD (Table 21.3).
Table 21.3 Misc7 Bit
PIN
MISC7 = 0 (DEFAULT)
MISC7 = 1
GPIO8
GPIO9
GPIO8
GPIO9
RCD
TXD
MISC6 – D6
The MISC6 bit is used in the LPC47N350 to select the pin function and the buffer mode between
GPIO17 and GATEA20 (Table 21.4). MISC6 also affects the multiplex functions of the OUT8, KSO12
pins (see Section 21.2, "Functions Available on More than One Pin" for Multiplexing control register
interactive effects).
Table 21.4 Misc6 Bit
PIN
MISC6 = 0 (DEFAULT)
MISC6 = 1
GPIO17
GPIO17
GATEA20
MISC4 – D4
The MISC4 bit is used in the LPC47N350 to select the pin function and the buffer mode between OUT10
and PWM0 for the OUT10 pin (Table 21.5).
Revision 1.1 (01-14-03)
242
SMSC LPC47N350
DATASHEET
SMSC [ SMSC CORPORATION ]
