MB3793-34A Datasheet, PDF (13/26 Pages) Cypress Semiconductor – Precise detection of power voltage fall: 2.5%

8.5 Clock pulse input supplementation (Positive clock pulse)
tCKT
tCKW
*¹
CK1
MB3793-34A
CK2
*²
VH
CTW
VL
Note : The MB3793 watchdog timer monitors Clock1 (CK1) and Clock2 (CK2) pulses alternately.
When a CK2 pulse is detected after detecting a CK1 pulse, the monitoring time setting capacity (C_TW)
switches to charging from discharging.
When two consecutive pulses occur on one side of this alternation before switching, the second pulse is
ignored.
In the above figure, pulse *1 and *2 are ignored.
Document Number: 002-08556 Rev. *A
Page 13 of 26