Interrupt And Reset From Voltage Monitoring 2 - Renesas RX100 Series User Manual

RX13T Group
8.6

Interrupt and Reset from Voltage Monitoring 2

Table 8.4 shows the procedures for setting bits related to the voltage monitoring 2 interrupt and voltage monitoring 2
reset. Table 8.5 shows the procedure for stopping bits related to the voltage monitoring 2 interrupt and voltage
monitoring 2 reset. Figure 8.6 shows an example of operations for a voltage monitoring 2 interrupt. For the operation of
the voltage monitoring 2 reset, see Figure 6.2 in section 6, Resets .
Table 8.4 Procedures for Setting Bits Related to the Voltage Monitoring 2 Interrupt and Voltage Monitoring 2
Reset
Step Voltage Monitoring 2 Interrupt
*1
1 Select the detection voltage by setting the LVDLVLR.LVD2LVL[1:0] bits.
*1
2 Set the LVD2CR0.LVD2RI bit to 0 (voltage monitoring 2
interrupt).
3 Select the timing of interrupt requests by setting the
LVD2CR1.LVD2IDTSEL[1:0] bits.
Select the type of interrupt by setting the
LVD2CR1.LVD2IRQSEL bit.
4
1
5* Set the LVCMPCR.LVD2E bit to 1 (voltage detection 2 circuit enabled).
1
6* Wait for at least Td
7 Set the LVD2CR0.LVD2CMPE bit to 1 (voltage monitoring 2 circuit comparison results output enabled).
8 Wait for at least 2 µs.
9 Set the LVD2SR.LVD2DET bit to 0.
10 Set the LVD2CR0.LVD2RIE bit to 1 (voltage monitoring 2
interrupt/reset enabled)
Note 1. Steps 1, 2, 5, and 6 are not required if operation is with the setting to select the voltage monitoring 2 interrupt
(LVD2CR0.LVD2RI = 0) and operation can be restarted by simply changing the settings of the LVD2CR1.LVD2IRQSEL and
LVD2IDTSEL[1:0] bits after monitoring is stopped or if restarting is in a case where the settings related to the voltage-detection
circuit were not changed after monitoring was stopped. When changes are to be made and operation is with the setting to select
the voltage monitoring 2 reset (LVD2CR0.LVD2RI = 1), proceed through all steps from 1 to 10.
Table 8.5 Procedures for Stopping Bits Related to the Voltage Monitoring 2 Interrupt and Voltage Monitoring
2 Reset
Step Voltage Monitoring 2 Interrupt
1 Set the LVD2CR0.LVD2RIE bit to 0 (voltage monitoring 2
interrupt/reset disabled).
2 Set the LVD2CR0.LVD2CMPE bit to 0 (voltage monitoring 2 circuit comparison results output disabled).
3 *1 Set the LVCMPCR.LVD2E bit to 0 (voltage monitoring 2 circuit disabled).
4
5 Modify settings of bits related to the voltage detection circuit registers other than LVCMPCR.LVD2E, LVD2CR0.LVD2RIE, and
LVD2CR0.LVD2CMPE.
Note 1. Step 3 is not required if operation is with the setting to select the voltage monitoring 2 interrupt (LVD2CR0.LVD2RI = 0) and
operation can be restarted by simply changing the settings of the LVD2CR1.LVD2IRQSEL and LVD2IDTSEL[1:0] bits after
monitoring is stopped or if restarting is in a case where the settings related to the voltage-detection circuit were not changed
after monitoring was stopped. When changes are to be made and operation is with the setting to select the voltage monitoring 2
reset (LVD2CR0.LVD2RI = 1), proceed through all steps from 1 to 5.
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
—
.
(E-A)
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8. Voltage Detection Circuit (LVDAb)
Voltage Monitoring 2 Reset
Set the LVD2CR0.LVD2RI bit to 1 (voltage monitoring 2
reset).
Select the type of reset negation by setting the
LVD2CR0.LVD2RN bit.
—
Set the LVD2CR0.LVD2RIE bit to 1 (voltage monitoring 2
interrupt/reset enabled).
—
—
—
Voltage Monitoring 2 Reset
—
Set the LVD2CR0.LVD2RIE bit to 0 (voltage monitoring 2
interrupt/reset disabled).
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