S3C8245/P8245/C8249/P8249 ADDRESS SPACES

2-7

PRIME REGISTER SPACEThe lower 192 bytes (00H–BFH) of the S3C8245/C8249's four or two 256-byte register pages is called prime registerarea. Prime registers can be accessed using any of the seven addressing modes(see Chapter 3, "Addressing Modes.")The prime register area on page 0 is immediately addressable following a reset. In order to address prime registerson pages 0, 1, 2, 3, or 4 you must set the register page pointer (PP) to the appropriate source and destinationvalues.
FFH
FCH
E0H
D0H
C0H
Set 1
Bank 0
Peripheral and I/O
General-purpose
CPU and system control
LCD data register
FFH
Page 3
Set 2
FFH
Page 2
Set 2
FFH
Page 1
Set 2
FFH
C0H
00H
BFH
Page 0
Set 2
Page 0
Prime
Space
LCD Data
Register Area
Page 4
00H
0FH
Bank 1
Figure 2-4. Set 1, Set 2, Prime Area Register, and LCD Data Register Map