Legacy-Free Keyboard/Embedded Controller with SPI and LPC Docking Interface
Table 17.1 Mailbox Registers Interface (continued)
MAILBOX
INDEX
8051
SYSTEM
R/W
ADDR.
(7F00+)
8051
R/W
POWER VCC1 VCC2
REGISTER NAME
ADDR
PLANE
POR
POR
NOTES
UART1 FIFO Control
Shadow register
MBX9Bh
R
-
-
VCC2
00h
Reserved
MBX9Ch
MBX9Dh
MBX9Eh
MBX9Fh
-
-
Note 17.3
PWM Control Register
Flash Program Register
Flash High Address
R/W
28h
35h
B0h
R/W
VCC1
30h
00h
-
-
-
-
Mailbox Register [10-
1F]
MBX
70h –
7Fh
A0h-AFh
PWM0 Frequency
Multiply
MBXB0h
MBXB1h
MBXB2h
MBXB3h
97h
98h
99h
9Ah
-
PWM1 Frequency
Multiply
-
00h
-
PWM2 Frequency
Multiply
VCC2
VCC1
-
PWM3 Frequency
Multiply
00h
Note 17.1 Interrupt is cleared when read by the 8051.
Note 17.2 Interrupt is cleared when read by the host.
Note 17.3 This register is reserved and should not be accessed.
17.2
Mailbox Registers Interface Base Address
Logical Device 9 in the LPC47N350 configuration space supports the Mailbox Registers Interface. The
three device configuration registers in LDN9 provide activation control and the base address for the
Mailbox Registers Interface run-time registers (Table 17.2).
Register 0x30 is the Activate register. The activation control (LDN9:CR30.0) qualifies address decoding
for the Mailbox Registers Interface; e.g., if the Activate bit D0 in the Activate register is “0”, the MBX
access port addresses will not be decoded; if the Activate bit is “1”, MBX access port addresses will be
decoded depending on the values programmed in the MBX Primary Base Address registers.
Registers 0x60 and 0x61 are the MBX Primary Base Address registers. Register 0x60 is the MBX
Primary Base Address High Byte, register 0x61 is the MBX Primary Base Address Low Byte.
Note: Bit D0 in the MBX Primary Base Address Low Byte must be “0”. Valid Mailbox Registers
Interface Base Address values are 0x0000 – 0x0FFE.
Table 17.2 Mailbox Registers Interface Configuration Controls (LDN9)
VCC1 &
HARD
SOFT
VCC2
VCC0
POR
INDEX
TYPE
RESET RESET POR
DESCRIPTION
D7 D6
D5
D4
D3
D2
D1
D0
0x30
R/W
0x00
0x00
0x00
-
Activate
Revision 1.1 (01-14-03)
192
SMSC LPC47N350
DATASHEET
SMSC [ SMSC CORPORATION ]
