C509-L_97 SIEMENS [Siemens Semiconductor Group], C509-L_97 Datasheet - Page 39

• Manufacturer Part Number: C509-L_97
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

3.4.7.2
As shown in chapter 3.4.2 to 3.4.5, each chipmode uses specific read/write control signals,
Table 3-3 gives a detailed survey about each chipmode and its control signals.
Table 3-3
Usage of Control Signals in the different Chipmodes
Operating Mode
(Chipmode)
Normal Mode
XRAM Mode
Bootstrap Mode
Programming
Mode
Semiconductor Group
Control Signals of the Chipmodes
Code Memory Control Data Memory Control
PSEN /
RDF
0000 H -
FFFF H
–
0200 H -
FFFF H
–
P3.7 / RD /
PSENX
–
0200 H -
F3FF H
–
0200 H -
F3FF H
P3.7 / RD /
PSENX
XMAP0=1 :
0000 H -
FFFF H
XMAP0=0 :
0000 H -
F3FF H
–
0000 H -
F3FF H
–
3-14
P3.6 / WR
XMAP0=1 :
0000 H -
FFFF H
XMAP0=0 :
0000 H -
F3FF H
–
0000 H -
F3FF H
–
Memory Organization
PSEN /
RDF
–
0000 H -
FFFF H
–
0000 H -
FFFF H
P6.3 /
WRF
–
–
–
0000 H -
FFFF H
1997-10-01
C509-L