47N350 Datasheet, PDF (297/346 Pages) SMSC Corporation – LEGACY FREE KEYBOARD EMBEDDED CONTROLLER WITH SPI AND LPC DOCKING INTERFACE

Legacy-Free Keyboard/Embedded Controller with SPI and LPC Docking Interface
To relocate the configuration ports base address after power-up, first write the lower address byte (LSB)
of the new base address to CR26 and then write the upper address bits to CR27.
Note: Writing CR27 changes the configuration ports base address.
Table 27.2 Configuration Port Address Registers
INDEX
HARD RESET
TYPE (SEE Note 27.2)
REGISTER
NAME
DESCRIPTION
D7 D6 D5 D4 D3 D2 D1 D0
GLOBAL CONFIGURATION REGISTERS
0x26
(See
Note 27.3)
R/W MODE = 0: 0x2E Configuration A7 A6 A5 A4 A3 A2 A1 “0”
MODE = 1: 0x4E Port Base
Address Byte 0
(LSB)
0x27
(See
Note 27.4)
R/W MODE = 0: 0x00 Configuration “0” “0” “0” “0” A11 A10 A9 A8
MODE = 1: 0x00 Port Base
Address Byte 1
(MSB)
Note 27.2 The MODE pin determines the configuration port base address following Hard Reset
Configuration Register (See Section Hard Reset Configuration Register). Soft Reset
Configuration Register has no effect on CR26 and CR27
Note 27.3 The configuration ports base address is relocatable on even-byte boundaries; i.e., A0 = “0”.
Note 27.4 Writing CR27 changes the configuration ports base address.
27.2.4 Configuration Register Reset Conditions
27.2.4.1 Hard Reset Configuration Register
HARD RESET = VCC2 POR or nRESET_OUT pin asserted.
(See Section 7.8.3.5, "Output Enable Register" for description 8051 control of nRESET_OUT)
27.2.4.2 Soft Reset Configuration Register
SOFT RESET = Configuration Control Register Bit0 set to a one by host.
27.2.5 Configuration Register Map
The LPC47N350 Configuration register map is shown below in Table 27.1.
Table 27.3 LPC47N350 Configuration Register Map
INDEX
TYPE
HARD
RESET
SOFT
RESET
CONFIGURATION REGISTER NAME
0x02
0x03
0x07
0x17
GLOBAL CONFIGURATION REGISTERS
W
0x00
0x00
Config Control
-
-
-
RESERVED
R/W
0x00
0x00
Logical Device Number
-
-
-
RESERVED
SMSC LPC47N350
279
DATASHEET
Revision 1.1 (01-14-03)