SAB-C509-LM SIEMENS [Siemens Semiconductor Group], SAB-C509-LM Datasheet - Page 16

• Manufacturer Part Number: SAB-C509-LM
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Memory Organization
The C509-L CPU manipulates data and operands in the following five address spaces:
Figure 5 illustrates the memory address spaces of the C509-L.
Figure 5
C509-L Memory Map
The C509-L can operate in four different operating modes (chipmodes) with different program and
data memory organizations :
Table 2 describes the program and data memory areas which are available in the different
chipmodes of the C509-L. It also shows the control bits of SFR SYSCON1, which are used for the
software selection of the chipmodes. Figures 6 to 9 shows the four chipmode configurations with
the code and data memory partitioning.
Semiconductor Group
– up to 64 Kbyte of external program memory
– up to 64 Kbyte of external data memory
– 512 byte of internal Boot ROM (program memory)
– 256 bytes of internal data memory
– 3 Kbyte of external XRAM data memory
– a 128 byte special function register area
– Normal Mode
– XRAM Mode
– Bootstrap Mode
– Programming Mode
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C509-L
09.96