C8051F970-A-GM Datasheet, PDF (75/454 Pages) Silicon Laboratories – Low Power Capacitive Sensing MCU with up to 32 kB of Flash

11.2. External Memory Interface Registers
C8051F97x
Register 11.1. EMI0CN: External Memory Interface Control
Bit
7
6
5
4
3
2
1
0
Name
PGSEL
Type
RW
Reset
0
0
0
0
0
0
0
0
SFR Page = 0x0; SFR Address: 0xB9
Bit
7:0
f
Name
PGSEL
Function
XRAM Page Select.
The XRAM Page Select field provides the high byte of the 16-bit external data memory
address when using an 8-bit MOVX command, effectively selecting a 256-byte page of
RAM.
0x00: 0x0000 to 0x00FF
0x01: 0x0100 to 0x01FF
...
0xFE: 0xFE00 to 0xFEFF
0xFF: 0xFF00 to 0xFFFF
Rev 1.0
75