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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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HCS08 Scheda tecnica(PDF) 37 Page - Motorola, Inc |
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HCS08 Scheda tecnica(HTML) 37 Page - Motorola, Inc |
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37 / 290 page  Data Sheet — MC9S08GB60/D V1.5 MOTOROLA 37 MC9S08GB/GT and this 1-kHz source are disabled. Power consumption is lower when the 1-kHz source is disabled, but in that case the real-time interrupt cannot wake the MCU from stop. 3.6.4 Active BDM Enabled in Stop Mode Entry into the active background mode from run mode is enabled if the ENBDM bit in BDCSCR is set. This register is described in the Development Support section of this data sheet. If ENBDM is set when the CPU executes a STOP instruction, the system clocks to the background debug logic remain active when the MCU enters stop mode so background debug communication is still possible. In addition, the voltage regulator does not enter its low-power standby state but maintains full internal regulation. If the user attempts to enter either stop1 or stop2 with ENBDM set, the MCU will instead enter stop3. Most background commands are not available in stop mode. The memory-access-with-status commands do not allow memory access, but they report an error indicating that the MCU is in either stop or wait mode. The BACKGROUND command can be used to wake the MCU from stop and enter active background mode if the ENBDM bit is set. Once in background debug mode, all background commands are available. The table below summarizes the behavior of the MCU in stop when entry into the background debug mode is enabled. 3.6.5 LVD Enabled in Stop Mode The LVD system is capable of generating either an interrupt or a reset when the supply voltage drops below the LVD voltage. If the LVD is enabled in stop by setting the LVDE and the LVDSE bits in SPMSC1 when the CPU executes a STOP instruction, then the voltage regulator remains active during stop mode. If the user attempts to enter either stop1 or stop2 with the LVD enabled for stop (LVDSE = 1), the MCU will instead enter stop3. The table below summarizes the behavior of the MCU in stop when the LVD is enabled. Table 3-2 BDM Enabled Stop Mode Behavior Mode PDC PPDC CPU, Digital Peripherals, FLASH RAM ICG ATD Regulator I/O Pins RTI Stop3 Don’t care Don’t care Standby Standby Active Disabled (1) NOTES: 1. Either ATD stop mode or power-down mode depending on the state of ATDPU. Active States held Optionally on Table 3-3 LVD Enabled Stop Mode Behavior Mode PDC PPDC CPU, Digital Peripherals, FLASH RAM ICG ATD Regulator I/O Pins RTI Stop3 Don’t care Don’t care Standby Standby Standby Disabled (1) NOTES: 1. Either ATD stop mode or power-down mode depending on the state of ATDPU. Active States held Optionally on |
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