PIC18LF24K Datasheet, PDF (551/594 Pages) –

PIC18(L)F26/45/46K40
TABLE 37-11: RESET, WDT, OSCILLATOR START-UP TIMER, POWER-UP TIMER, BROWN-OUT
RESET AND LOW-POWER BROWN-OUT RESET SPECIFICATIONS
Standard Operating Conditions (unless otherwise stated)
Param
No.
Sym.
Characteristic
Min. Typ† Max. Units
Conditions
RST01* TMCLR MCLR Pulse Width Low to ensure Reset
2
—
—
s
RST02* TIOZ
I/O high-impedance from Reset detection —
—
2
s
RST03 TWDT Watchdog Timer Time-out Period
—
16
—
ms 1:512 Prescaler
RST04*
RST05
RST06
TPWRT
TOST
VBOR
Power-up Timer Period
Oscillator Start-up Timer Period^(1,2)
Brown-out Reset Voltage⁽⁴⁾
—
65
—
ms
— 1024 — TOSC
2.7 2.85 3.0
2.55 2.7 2.85
2.3 2.45 2.6
2.3 2.45 2.6
1.8 1.9 2.05
V BORV = 00
V BORV = 01
V BORV = 10
V BORV = 11 (PIC18Fxxx)
V BORV = 11 (PIC18LFxxx)
RST07 VBORHYS Brown-out Reset Hysteresis
—
40
—
mV
RST08 TBORDC Brown-out Reset Response Time
—
3
—
s
RST09 VLPBOR Low-Power Brown-out Reset Voltage
1.8 1.9 2.2
V
* These parameters are characterized but not tested.
† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
Note 1: By design, the Oscillator Start-up Timer (OST) counts the first 1024 cycles, independent of frequency.
2: To ensure these voltage tolerances, VDD and VSS must be capacitively decoupled as close to the device as possible.
0.1 F and 0.01 F values in parallel are recommended.
TABLE 37-12: HIGH/LOW-VOLTAGE DETECT CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Param. No. _Symbol
Characteristic
Min. Typ†
Max.
Units
HLVD01
V_DET
Voltage Detection
—
1.90
—
V
—
2.10
—
V
—
2.25
—
V
—
2.50
—
V
—
2.60
—
V
—
2.75
—
V
—
2.90
—
V
—
3.15
—
V
—
3.35
—
V
—
3.60
—
V
—
3.75
—
V
—
4.00
—
V
—
4.20
—
V
—
4.35
—
V
—
4.65
—
V
Conditions
HLVDSEL<3:0>=0000
HLVDSEL<3:0>=0001
HLVDSEL<3:0>=0010
HLVDSEL<3:0>=0011
HLVDSEL<3:0>=0100
HLVDSEL<3:0>=0101
HLVDSEL<3:0>=0110
HLVDSEL<3:0>=0111
HLVDSEL<3:0>=1000
HLVDSEL<3:0>=1001
HLVDSEL<3:0>=1010
HLVDSEL<3:0>=1011
HLVDSEL<3:0>=1100
HLVDSEL<3:0>=1101
HLVDSEL<3:0>=1110
 2016 Microchip Technology Inc.
Preliminary
DS40001816C-page 551