SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 262

• Manufacturer Part Number: SAF-C164SM
• Description: 16-Bit CMOS Microcontroller
• Manufacturer: Infineon Technologies

Memory Configuration after Reset
After reset in Bootstrap-Loader mode, the configuration (i.e. the accessibility) of the
C164CM’s memory areas differs from the standard case. Pin EA is not evaluated when
BSL mode is selected and accesses to the internal code memory are partly redirected
while the C164CM is in BSL mode (see
special Boot-ROM, while data accesses read from the internal code memory. Data
accesses will return undefined values on ROMless devices.
Note: The code in the Boot-ROM is not an invariant feature of the C164CM. User
Table 15-1
BSL mode active
EA pin
Code fetch from
internal ROM area
Data fetch from
internal ROM area
User’s Manual
software should not try to execute code from the internal ROM area while the BSL
mode is still active, as these fetches will be redirected to the Boot-ROM.
The Boot-ROM will also “move” to segment 1, when the internal ROM area is
mapped to segment 1.
BSL Memory Configurations
Int.
RAM
Boot-ROM access
User ROM access
16 MBytes
1
0
high
Yes
Access to
external
bus
disabled
Access to
int. ROM
enabled
MCA04383
Table
15-4
Int.
RAM
Boot-ROM access
User ROM access
15-1). All code fetches are made from the
16 MBytes
1
0
Yes
low
Access to
external
bus
enabled
Access to
int. ROM
enabled
MCA04384
Int.
RAM
C164CM/C164SM
User ROM access
User ROM access
acc. to application
Bootstrap Loader
16 MBytes
1
0
Derivatives
V1.0, 2002-02
No
Depends
on reset
config.
(EA, P0)
Depends
on reset
config.
MCA04385