
Setting it to "01" allows STOP mode to be released when the supply voltage (VDD) becomes equal to or higher
than the detection voltage (VDxLVL).
Setting it to "10" allows STOP mode to be released depending on the state of the STOP pin or when the supply
voltage (VDD) becomes equal to or higher than the detection voltage (VDxLVL).
Refer to Section 2 "CPU" for settings to activate or release STOP mode.
Note 1: After STOP mode is released by a voltage detection STOP mode release signal, the interrupt latch becomes
"1". If it is undesirable to accept an interrupt after STOP mode is released, disable interrupts before STOP
mode is activated. In addition, clear the interrupt latch before enabling interrupts after STOP mode is re-
leased.
Note 2: If the supply voltage (VDD) becomes equal to or higher than the detection voltage (VDxLVL) within 1 machine
cycle after SYSCR1<STOP> is set to "1" and STOP mode is activated, STOP mode is not released.
Note 3: When the voltage detection interrupt request signal of the voltage detection circuit is used as the STOP mode
release signal, take into account sudden fluctuations in the supply voltage (VDD) and changes near the
detection voltage (VDxLVL) in setting the detection voltage (VDxLVL) and the warm-up time.
Note 4: If VDCR2<SRSS> is set to "01", STOP mode can not be released by STOP pin (P11 port). However, because
the input gate of P11 port is enabled regardless of VDCR2<SRSS> setting, if its pin become high impedance,
a penetration current will flow. Therefore, in this case, STOP pin (P11 port) input should be fixed to "H" or
"L" level when the STOP mode is started.
Detection voltage level
Voltage detection interrupt
request signal
STOP mode is released at the falling
edge of VDCR1<VDxSF>
VDD level
VDCR1<VDxSF>
STOP mode is released at the falling
edge of VDCR1<VDxSF>
NORMAL mode
STOP mode
STOP mode is
activated by
programming.
STOP mode is
activated by
programming.
STOP mode
Warm-up
NORMAL mode
Warm-up
Figure 7-4 STOP Mode Release by VDCR1<VDxSF>
TMP89FH42
7. Voltage Detection Circuit
7.3 Function
Page 88
RA003