SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 389

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

Adapt Mode
Pin P0L.1 (ADP) selects the Adapt Mode when latched low at the end of reset. In this
mode, the C164CM goes into a passive state similar to its state during reset. The pins of
the C164CM float to tristate or are deactivated via internal pull-up/pull-down devices, as
described for the reset state. Additionally, the RSTOUT pin floats to tristate rather than
being driven low. The on-chip oscillator and the realtime clock are disabled.
This mode allows a C164CM mounted to a board to be virtually switched off. This
enables an emulator to control the board’s circuitry even though the original C164CM
remains in place. The original C164CM may resume control of the board after a reset
sequence with P0L.1 high. Please note that adapt mode overrides any other
configuration via PORT0.
Default: Adapt Mode is off.
Note: When XTAL1 is fed by an external clock generator (while XTAL2 is left open), this
User’s Manual
clock signal may also be used to drive the emulator device.
However, if a crystal is used, the emulator device’s oscillator can use this crystal
only if at least XTAL2 of the original device is disconnected from the circuitry (the
output XTAL2 will be driven high in Adapt Mode).
Adapt mode can be activated only upon an external reset (EA = ‘0’). Pin P0L.1 is
not evaluated upon a single-chip reset (EA = ‘1’).
20-15
C164CM/C164SM
System Reset
Derivatives
V1.0, 2002-02