R01UH0822EJ0100 Rev.1.00
Page 123 of 1041
Jul 31, 2019
RX13T Group
8. Voltage Detection Circuit (LVDAb)
8.3
VCC Input Voltage Monitor
8.3.1
Monitoring Vdet0
Monitoring Vdet0 is not possible.
8.3.2
Monitoring Vdet1
After making the following settings, the LVD1SR.LVD1MON flag can be used to monitor the results of comparison by
voltage monitor 1.
(1) Specify the detection voltage by setting the LVDLVLR.LVD1LVL[3:0] bits (voltage detection 1 level select).
(2) Set the LVCMPCR.LVD1E bit to 1 (voltage detection 1 circuit enabled).
(3) After waiting for Td
(E-A)
, set the LVD1CR0.LVD1CMPE bit to 1 (voltage monitoring 1 circuit comparison results
output enabled).
8.3.3
Monitoring Vdet2
After making the following settings, the LVD2SR.LVD2MON flag can be used to monitor the results of comparison by
voltage monitor 2.
(1) Specify the detection voltage by setting the LVDLVLR.LVD2LVL[1:0] bits (voltage detection 2 level select).
(2) Set the LVCMPCR.LVD2E bit to 1 (voltage detection 2 circuit enabled).
(3) After waiting for Td
(E-A)
, set the LVD2CR0.LVD2CMPE bit to 1 (voltage monitoring 2 circuit comparison results
output enabled).