PIC12CR509AT-04 查看數據表（PDF） - Microchip Technology
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PIC12CR509AT-04 Datasheet PDF : 113 Pages
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PIC12C5XX
11.4 Timing Diagrams and Specifications
FIGURE 11-2: EXTERNAL CLOCK TIMING - PIC12C508/C509
Q4
OSC1
Q1
Q2
Q3
1
3
3
2
Q4
Q1
4
4
TABLE 11-2: EXTERNAL CLOCK TIMING REQUIREMENTS - PIC12C508/C509
AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
0°C ≤ TA ≤ +70°C (commercial),
–40°C ≤ TA ≤ +85°C (industrial),
–40°C ≤ TA ≤ +125°C (extended)
Operating Voltage VDD range is described in Section 11.1
Parameter
No.
Sym
Characteristic
Min Typ(1) Max Units
Conditions
FOSC External CLKIN Frequency(2)
DC —
4 MHz XT osc mode
DC — 200 kHz LP osc mode
Oscillator Frequency(2)
0.1 —
4 MHz XT osc mode
DC — 200 kHz LP osc mode
1
TOSC External CLKIN Period(2)
250 —
250 —
— ns EXTRC osc mode
— ns XT osc mode
5
—
— ms LP osc mode
Oscillator Period(2)
250 —
— ns EXTRC osc mode
250 — 10,000 ns XT osc mode
5
—
— ms LP osc mode
2
Tcy
Instruction Cycle Time(3)
— 4/FOSC —
—
3
TosL, TosH Clock in (OSC1) Low or High Time 50* —
— ns XT oscillator
2*
—
— ms LP oscillator
4
TosR, TosF Clock in (OSC1) Rise or Fall Time
—
—
25* ns XT oscillator
—
—
50* ns LP oscillator
* These parameters are characterized but not tested.
Note 1: 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.
2: 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.
3: Instruction cycle period (TCY) equals four times the input oscillator time base period.
DS40139E-page 70
© 1999 Microchip Technology Inc.
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