Datasheet

MCP131X/2X
DS21985D-page 10  2005-2012 Microchip Technology Inc.
FIGURE 1-2: MR and Reset Pin Waveforms.
TABLE 1-2: MR
AND RESET PIN TIMINGS
FIGURE 1-3: WDI and Reset Pin Waveforms.
TABLE 1-3: WDI AND RESET PIN TIMINGS
Electrical Specifications: Unless otherwise indicated, all limits are specified for V
DD
= 1V to 5.5V, R
PU
= 100 k
(only MCP1320, MCP1321, and MCP1322), T
A
= -40°C to +125°C.
Parameters Sym Min Typ Max Units Conditions
MR Pulse Width t
MR
1— —µs
MR
Active to RST/RST Active t
MRD
— 235 — ns V
DD
= 5.0V
MR Input Noise filter t
NF
— 150 — ns V
DD
= 5.0V
Note 1: These parameters are for design guidance only and are not 100% tested.
Electrical Specifications: Unless otherwise indicated, all limits are specified for V
DD
= 1V to 5.5V, R
PU
= 100 k
(only MCP1320, MCP1321, and MCP1322), T
A
= -40°C to +125°C.
Parameters Sym Min Typ Max Units Conditions
WDI Pulse Width t
WP
50 — — ns
Watchdog Time-Out Period t
WD
4.3 6.3 9.3 ms Note 1
71 102 153 ms Note 1
1.12 1.6 2.4 sec Standard Time Out
17.9 25.6 38.4 sec Note 1
Note 1: Custom ordered WatchDog Timer time out; minimum order volume requirement.
MR
RST
t
RST
t
MR
RST
t
MRD
t
NF
RST
RST
WDI (Note 1)
t
WP
t
WD
t
WD
t
RST
Note 1: The WDI pin was a weak pull-up resistor which is disabled after the 1st falling edge on the WDI pin.