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参数资料
| 型号： | SAF-C515-LN |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, 16 MHz, MICROCONTROLLER, PQCC68 |
| 封装： | PLASTIC, LCC-68 |
| 文件页数： | 40/162页 |
| 文件大小： | 771K |
| 代理商： | SAF-C515-LN |
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Semiconductor Group
9-3
Power Saving Modes
C515
9.3
Idle Mode
In the idle mode the oscillator of the C515 continues to run, but the CPU is gated off from the clock
signal. However, the interrupt system, the serial port, the A/D converter, and all timers with the
exception of the watchdog timer are further provided with the clock. The CPU status is preserved in
its entirety: the stack pointer, program counter, program status word, accumulator, and all other
registers maintain their data during idle mode.
The reduction of power consumption, which can be achieved by this feature depends on the number
of peripherals running. If all timers are stopped and the A/D converter, and the serial interfaces are
not running, the maximum power reduction can be achieved. This state is also the test condition for
the idle mode ICC.
Thus, the user has to take care which peripheral should continue to run and which has to be stopped
during idle mode. Also the state of all port pins – either the pins controlled by their latches or
controlled by their secondary functions – depends on the status of the controller when entering idle
mode.
Normally, the port pins hold the logical state they had at the time when the idle mode was activated.
If some pins are programmed to serve as alternate functions they still continue to output during idle
mode if the assigned function is on. This especially applies to the serial interface in case it cannot
finish reception or transmission during normal operation. The control signals ALE and PSEN are
held at logic high levels.
As in normal operation mode, the ports can be used as inputs during idle mode. Thus a capture or
reload operation can be triggered, the timers can be used to count external events, and external
interrupts will be detected.
The idle mode is a useful feature which makes it possible to "freeze" the processor's status - either
for a predefined time, or until an external event reverts the controller to normal operation, as
discussed below. The watchdog timer is the only peripheral which is automatically stopped during
idle mode.
相关PDF资料 |
PDF描述 |
|---|---|
| SAH-C515-LN | 8-BIT, 16 MHz, MICROCONTROLLER, PQCC68 |
| SAB-C515-LM | 8-BIT, 16 MHz, MICROCONTROLLER, PQFP80 |
| SAB-C515C-LM | 8-BIT, 10 MHz, MICROCONTROLLER, PQFP80 |
| SAB-XC164CM-8F40F | 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP64 |
| SAB-XC164CM-4F40F | 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP64 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SAF-C517A | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-bit CMOS MICROCONTROLLER |
| SAF-C517A-4R24M | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C517A-4RM | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C517A-L | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8 BIT CMOS MICROCONTROLLER |
| SAF-C517A-LM | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
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