SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 169

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

is triggered by the SRST instruction, or by a watchdog timer overflow, or by application
of a low level to the RSTIN line, an internal driver pulls it low for the duration of the
internal reset sequence. It is released afterwards and is then controlled by the external
circuitry alone.
The bidirectional reset function is useful for applications in which external devices
require a defined reset signal but cannot be connected to the C164CM’s RSTOUT
signal, e.g. an external flash memory which must come out of reset and deliver code well
before RSTOUT can be deactivated via EINIT.
The following behavior differences must be observed when using the bidirectional reset
feature in an application:
• Bit BDRSTEN in register SYSCON cannot be changed after EINIT and is cleared
• The reset indication flags always indicate a long hardware reset.
• The PORT0 configuration is treated like on a hardware reset. In particular, the
• Pin RSTIN may be connected only to external reset devices with an open drain output
• A short hardware reset is extended to the duration of the internal reset sequence.
The Reference Voltage pins for the Analog/Digital Converter
provide a separate power supply (reference voltage) for the comparator circuitry of the
on-chip ADC. This reduces the noise which is coupled to the analog input signals from
the digital logic sections and so improves the stability of the conversion results when
V
The Power Supply pins
the C164CM. The respective
possible. For best results, it is recommended to implement two-level decoupling, for
example, the widely used 100 nF in parallel with 30 … 40 pF capacitors which deliver
the peak currents.
Note: All
The External Programming Voltage
required to program the on-chip OTP program memory.
Note: This feature is only available in OTP-devices, of course.
User’s Manual
AREF
automatically after a reset.
bootstrap loader may be activated when P0L.4 is low.
driver.
respectively.
and
V
DD
V
AGND
pins and all
are properly discoupled from
V
V
DD
SS
V
DD
pins must be connected to the power supply and ground,
and
/
V
V
SS
SS
pairs should be decoupled as close to the pins as
provide the power supply for the digital logic of
V
PP
8-2
is applied to pin P20.5/EA/
V
DD
and
V
SS
.
C164CM/C164SM
V
AREF
Dedicated Pins
Derivatives
V
V1.0, 2002-02
and
PP
. This is
V
AGND