PIC16C55-HS Datasheet, PDF (162/194 Pages) Microchip Technology – EPROM/ROM-Based 8-bit CMOS Microcontroller Series

PIC16C5X
19.4 Timing Diagrams and Specifications
FIGURE 19-3:
EXTERNAL CLOCK TIMING - PIC16C5X-40
Q4
Q1
Q2
Q3
Q4
Q1
OSC1
1
3
3
4
4
2
CLKOUT
TABLE 19-1: EXTERNAL CLOCK TIMING REQUIREMENTS - PIC16C5X-40
AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature 0°C ≤ TA ≤ +70°C for commercial
Param
No.
Symbol
Characteristic
Min Typ† Max Units
Conditions
FOSC External CLKIN Frequency⁽¹⁾
20 —
40 MHz HS OSC mode
1
TOSC External CLKIN Period⁽¹⁾
25 —
— ns HS OSC mode
2
Tcy Instruction Cycle Time⁽²⁾
— 4/FOSC — —
3
TosL, TosH Clock in (OSC1) Low or High 6.0* —
— ns HS oscillator
Time
4
TosR, TosF Clock in (OSC1) Rise or Fall
— — 6.5* ns HS oscillator
Time
* These parameters are characterized but not tested.
† Data in the Typical (“Typ”) column is at 5V, 25°C unless otherwise stated. These parameters are for design
guidance only and are not tested.
Note 1: All specified values are based on characterization data for that particular oscillator type under standard oper-
ating 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.
2: Instruction cycle period (TCY) equals four times the input oscillator time base period.
DS30453D-page 160
Preliminary
© 2002 Microchip Technology Inc.