Datasheet

 2000 Microchip Technology Inc. Preliminary DS40197B-page 65
PIC16HV540
10.4 Timing Diagrams and Specifications
FIGURE 10-2: EXTERNAL CLOCK TIMING - PIC16HV540
TABLE 10-1: EXTERNAL CLOCK TIMING REQUIREMENTS - PIC16HV540
AC Characteristics Standard Operating Conditions (unless otherwise specified)
Operating Temperature 0°C ≤ T
A ≤ +70°C (commercial)
–40°C ≤ T
A ≤ +85°C (industrial)
Parameter
No.
Sym. Characteristic Min. Typ.
(1)
Max.
Unit
s
Conditions
F
OSC External CLKIN Frequency
(2)
DC — 4.0 MHz RC osc mode
DC — 2.0 MHz HS osc mode
DC — 4.0 MHz XT osc mode
DC — 200 kHz LP osc mode
Oscillator Frequency
(2)
DC — 4.0 MHz RC osc mode
0.1 — 2.0 MHz HS osc mode
0.1 — 4.0 MHz XT osc mode
5 — 200 kHz LP osc mode
1
TOSC External CLKIN Period
(2)
250 ——ns RC osc mode
250 ——ns HS osc mode
250 ——ns XT osc mode
5.0 ——µs LP osc mode
Oscillator Period
(2)
250 ——ns RC osc mode
250 — 10,000 ns HS osc mode
250 — 10,000 ns XT osc mode
50 — 200 µs LP osc mode
2
TCY Instruction Cycle Time
(3)
— 4/FOSC ——
3
To sL ,
To sH
Clock in (OSC1) Low or High Time 50* ——ns XT oscillator
20* ——ns HS oscillator
2.0* ——µs LP oscillator
4
Tos R,
To sF
Clock in (OSC1) Rise or Fall Time —— 25* ns XT oscillator
—— 25* ns HS oscillator
—— 50* ns LP oscillator
* These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ ”) column is at V
REG = 5V, VDD = 9V, 25°C unless otherwise stated. These parame-
ters are for design guidance only and are not tested.
2: All specified values are based on characterization data for that particular oscillator type under standard
operating conditions with the device executing code. Exceeding these specified limits may result in an
unstable oscillator operation and/or higher than expected current consumption.
When an external clock input is used, the “max” cycle time limit is “DC” (no clock) for all devices.
3: Instruction cycle period (T
CY) equals four times the input oscillator time base period.
OSC1
CLKOUT
Q4
Q1 Q2
Q3 Q4 Q1
133
44
2