SAB80C515A-5 SIEMENS [Siemens Semiconductor Group], SAB80C515A-5 Datasheet - Page 17

• Manufacturer Part Number: SAB80C515A-5
• Description: 8-Bit CMOS Single-Chip Microcontroller Family
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Memory Organization
Figure 3-2
Write Page Address to Port 2
MOV P2, pageaddress will write the page address to Port 2 and XPAGE-Register.
When external RAM is to be accessed in the XRAM address range (F800 H - FFFF H ) XRAM has to
be disabled. When additional external RAM is to be addressed in an address range
XRAM
(F800 H ) XRAM may remain being enabled and there is no need to overwrite XPAGE by a second
move.
Semiconductor Group
3-10