SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 405
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SAF-C164SM
Manufacturer Part Number
SAF-C164SM
Description
16-Bit CMOS Microcontroller
Manufacturer
Infineon Technologies
Datasheet
1.SAF-C164SM.pdf
(470 pages)
- Current page: 405 of 470
- Download datasheet (6Mb)
21.3.1
In Idle mode, the CPU clocks are turned off and all peripherals continue their normal
operation. Therefore, all port pins configured as general purpose output pins, will output
the last data value written to their port output latches. If the alternate output function of
a port pin is used by a peripheral, the state of the pin is determined by the operation of
the peripheral.
Port pins used for bus control functions go into the state which represents the inactive
state of the respective function (e.g. WR), or to a defined state which is based on the last
bus access. Port pins used as external address/data bus hold the address/data which
was output during the last external memory access before entry into Idle mode under the
following conditions:
• P0H.2-0 outputs the high bits of the last address if a multiplexed bus mode with 8-bit
• PORT1 outputs the lower 16 bits of the last address if a demultiplexed bus mode is
In Sleep mode, the oscillator (except for RTC operation) and the clocks to the CPU and
to the peripherals are turned off. As in Idle mode, all port pins configured as general
purpose output pins will output the last data value written to their port output latches.
When the alternate output function of a port pin is used by a peripheral the state of this
pin is determined by the last action of the peripheral before the clocks were switched off.
In Power Down mode, the oscillator (except for RTC operation) and the clocks to the
CPU and to the peripherals are turned off. As in Idle mode, all port pins configured as
general purpose output pins will output the last data value written to their port output
latches.
When the alternate output function of a port pin is used by a peripheral, the state of this
pin is determined by the last action of the peripheral before the clocks were switched off.
Note: All pin drivers can be switched off by selecting the general port disable function
User’s Manual
data bus is used. Otherwise, P0H.2-0 is floating. P0L is always floating in Idle mode.
used. Otherwise, the output pins of PORT1 represent the port latch data.
prior to entering Power Down mode.
When the supply voltage is lowered in Power Down mode, the high voltage of
output pins will decrease accordingly.
Output Pins Status During Power Reduction Modes
21-9
Power Management
C164CM/C164SM
Derivatives
V1.0, 2002-02
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