Freescale Semiconductor MPC5604B - 2. Configuration

Figure 80 : STANDBY Mode Configuration Register (R.M. Rev8 – Fig. 8-16)
In this mode, the power supply is only used for MC_RGM (Reset Generation Module), MC_PCU
(Power Control Unit), WKPU (Wakeup unit), 8k RAM, RTC/API, CAN_Sampler, SIRC, FIRC and
SXOSC. This mode is usually configured to run on SIRC or FIRC (running on SIRC and disabling
FIRC saves even more power). When a wakeup signal is received, the device modes and clock are
reconfigured in the DRUN mode (first lines of the “main” function).
2.
Introduction
Wake-up events allows mode transition from STANDBY mode to DRUN mode or from STOP to
RUN 0…3 modes.
Figure 81 : Wakeup Unit Block Diagram (R.M. Rev8 – Fig. 12-1)