FM32L278/L276/L274/L272 - 3V I2C Companion
Supervisor Timing (TA = -40° C to + 85° C, VDD = 2.7V to 3.6V)
Symbol
Parameter
/RST Active (low) after VDD>VTP
VDD < VTP noise immunity
VDD Rise Time
Min
100
10
Max
200
25
Units
ms
Notes
tRPU
tRNR
1
1,2
1,2
µs
tVR
50
-
µs/V
µs/V
ms
tVF
VDD Fall Time
100
100
tDOG
0
-
tWDP
tWDOG
fCNT
Pulse Width of /RST for Watchdog Reset
Timeout of Watchdog
Frequency of Event Counters
200
2*tDOG
10
ms
3
MHz
Notes
1
2
3
This parameter is characterized but not tested.
Slope measured at any point on VDD waveform.
tDOG is the programmed time in register 0Ah, VDD > VTP and tRPU satisfied.
/RST Timing
VDD
VTP
VRST
tRNR
tRPU
RST
Rev. 3.0
Feb. 2009
Page 18 of 21
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
