ZAMC4100GA2R datasheet(47/156 Pages) RENESAS

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ZAMC4100 Datasheet

January 26, 2016

Table 3.9). This interrupt is useful if the MCU has executed a clock-gating instruction and the software execution

is stopped until an event on the IRQN line occurs.

WDT Wake-up on System Reset Time-Out (SLEEP Mode)

This wake-up is generated only when the system is in SLEEP Mode and the watchdog timer is enabled to run in

SLEEP Mode (WDTPMEN = 1). When a system reset time-out occurs, it does not generate system reset, only a

wake-up event and return to the NORMAL Mode.

Wake-up on SBC Interrupt (STANDBY Mode)

The previous sections described the most common sources for waking up the system and returning to the

NORMAL Mode: the LIN wake up and WDT time-out. In general when the system is in STANDBY Mode, any SBC

interrupt propagated on the IRQN line will restore the MCU clock and switch the system to the NORMAL Mode.

3.5.5.

Operational Modes Control

Switching from NORMAL to SLEEP or STANDBY Mode is initiated by the MCU by setting the SLEEP or STBY

bits of register SMDCTRL (Table 3.5).

The SLEEP Mode is activated by setting the SLEEP bit = 1. The STANDBY Mode is activated by setting the

STBY bit = 1. If the MCU reads the SLEEP or STBY bits, the returned result is 0.

NOTE: If the MCU tries to set both bits at the same time, the write command will be ignored.

Table 3.5

SMDCTRL Register Bits Mapping

Name

SMDCTRL

Bit No

Bit name

Reset

Access

R/W

Address

0x03

R/W = Read/Write bit; W = Write-only bit, read as 0;

U = Unimplemented, read as ‘0’

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