SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 380

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

The C164CM’s Pins after Reset
After the reset sequence, the various groups of pins of the C164CM are activated in
different ways depending on their function. Bus and control signals are activated
immediately after the reset sequence according to the configuration latched from
PORT0, so either external accesses can take place or the external control signals will be
inactive. The general purpose IO pins remain in input mode (high impedance) until
reprogrammed via software (see
until the end of the initialization routine (see description).
Figure 20-3 Reset Input and Output Signals
User’s Manual
RSTIN
RD, WR
ALE
Bus
IO
RSTOUT
RSTIN
When the internal reset condition is extended by RSTIN, the activation of the output signals is
delayed until the end of the internal reset condition.
1)
2)
3)
4)
5)
6)
7)
8)
Current bus cycle is completed or aborted.
Switches asinchronously with RSTIN, sinchronously upon software or watchdog reset.
The reset condition ends here. The C 167CR starts program execution.
Activation of the IO pins is controlled by software.
Execution of the EINIT instruction.
The shaded area designates the internal reset sequence, which starts after synchronization of RSTIN.
A short hardware reset is extended until the end of the reset sequence in Bidirectional reset mode.
A software or WDT reset activates the RSTIN line in Bidirectional reset mode.
1)
2)
2)
8)
Internal Reset Condition
Internal Reset Condition
Figure
6)
6)
20-3). The RSTOUT pin remains active (low)
20-6
3)
7)
Initialization
3)
Initialization
C164CM/C164SM
System Reset
Derivatives
V1.0, 2002-02
4)
5)
MCS02258