MMC2107 - Freescale Semiconductor

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Reset Controller Module Freescale Semiconductor, Inc. 5.6.2 Reset Status Register The reset status register (RSR) contains a status bit for every reset source. When reset is entered, the cause of the reset condition is latched along with a value of 0 for the other reset sources that were not pending at the time of the reset condition. These values are then reflected in the RSR. One or more status bits may be set at the same time. The cause of any subsequent reset is also recorded in the register, overwriting status from the previous reset condition. nc... Freescale Semiconductor, I RSR can be read at any time. Writing to RSR has no effect. Address: 0x000c4_0001 Bit 7 6 5 4 3 2 1 Bit 0 Read: 0 0 SOFT WDR POR EXT LOC LOL Write: Reset: 0 0 Reset dependent = Writes have no effect and the access terminates without a transfer error exception. Figure 5-3. Reset Status Register (RSR) SOFT— Software Reset Flag SOFT indicates that the last reset was caused by software. 1 = Last reset caused by software 0 = No software reset WDR — Watchdog Timer Reset Flag WDR indicates that the last reset was caused by a watchdog timer timeout. 1 = Last reset caused by watchdog timer timeout 0 = No watchdog timer timeout reset POR — Power-On Reset Flag POR indicates that the last reset was caused by a power-on reset. 1 = Last reset caused by power-on reset 0 = Last reset not caused by power-on reset Technical Data MMC2107 – Rev. 2.0 134 Reset Controller Module MOTOROLA For More Information On This Product, Go to: www.freescale.com
Freescale Semiconductor, Inc. Reset Controller Module Memory Map and Registers EXT — External Reset Flag EXT indicates that the last reset was caused by an external device asserting the external RESET pin. 1 = Last reset state caused by external device asserting the external RESET pin 0 = No external reset nc... Freescale Semiconductor, I 5.6.3 Reset Test Register LOC — Loss of Clock Reset Flag LOC indicates that the last reset state was caused by a loss of clock detected by the loss of clock circuit. 1 = Last reset caused by loss of clock 0 = No loss of clock reset LOL — Loss of Lock Reset Flag LOL indicates that the last reset state was caused by a loss of lock detected by the PLL circuit. 1 = Last reset caused by loss of lock 0 = No loss of lock The reset test register (RTR) is used only for factory testing. This register is read-only when not in test mode. Address: 0x000c4_0002 Bit 7 6 5 4 3 2 1 Bit 0 Read: 0 0 0 0 0 0 0 0 Write: Reset: 0 0 0 0 0 0 0 0 = Writes have no effect and the access terminates without a transfer error exception. Figure 5-4. Reset Test Register (RTR) MMC2107 – Rev. 2.0 Technical Data MOTOROLA Reset Controller Module 135 For More Information On This Product, Go to: www.freescale.com
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