Legacy-Free Keyboard/Embedded Controller with SPI and LPC Docking Interface
Table 7.7 8051 On-Chip External Memory Mapped Registers (continued)
SYSTEM
8051
MMCR
SYSTEM
ADDRESS ADDRESS
8051
POWER VCC1 VCC2
REGISTER NAME
ADDRESS
TYPE
(7F00+)
TYPE
PLANE
POR
POR
NOTE
System-to-8051
MBX 82h
R/W
08h
RC
VCC1
00
Note 7.12
Mailbox register 0
8051-to-system
MBX 83h
RC
09h
0A-17h
18h
R/W
Note 7.13
Mailbox register 1
Mailbox register [2-F]
MBX
R/W
00h
84h-91h
GPIO Direction
register A
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
GPIO Output register
A
19h
GPIO Input register
A
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
R
-
GPIO Direction
register B
R/W
00h
GPIO Output register
B
GPIO Input register
B
R
-
GPIO Direction
register C
R/W
00h
GPIO Output register
C
GPIO Input register
C
20h
R
-
LED register
OUT register D
OUT register E
-
-
-
-
-
-
-
-
-
21h
22h
23h
24h
R/W
00h
R
-
-
Revision 1.1 (01-14-03)
SMSC LPC47N350
DATA5S2HEET
SMSC [ SMSC CORPORATION ]
