ZAMC4100 Datasheet, PDF (47/155 Pages) Integrated Device Technology – Actuator and Motor Controller

ZAMC4100 Datasheet
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
7
6
5
4
3
2
1
0
Bit name
Reset
U
0
0
0
1
1
0
0
Access
U
R/W R/W R/W R/W R/W
W
W
Address
0x03
R/W = Read/Write bit; W = Write-only bit, read as 0;
U = Unimplemented, read as ‘0’
© 2016 Integrated Device Technology, Inc.
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January 26, 2016