RFPIC12F675 Datasheet, PDF (99/136 Pages) Microchip Technology – FLASH-Based Microcontroller with ASK/FSK Transmitter

rfPIC12F675
13.12 AC CHARACTERISTICS: rfPIC12F675 (INDUSTRIAL, EXTENDED)
FIGURE 13-5:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
Q1
OSC1
CLKOUT
1
3
3
4
4
2
TABLE 13-1: EXTERNAL CLOCK TIMING REQUIREMENTS
Param
No.
Sym
Characteristic
Min Typ† Max Units
Conditions
FOSC External CLKIN Frequency⁽¹⁾ DC —
DC —
DC —
37 kHz LP Osc mode
4 MHz XT mode
20 MHz HS mode
Oscillator Frequency⁽¹⁾
1
TOSC External CLKIN Period⁽¹⁾
Oscillator Period⁽¹⁾
DC —
5
—
—
4
DC —
0.1 —
1
—
27 —
50 —
50 —
250 —
27
— 250
250 —
20 MHz EC mode
37 kHz LP Osc mode
— MHz INTOSC mode
4 MHz RC Osc mode
4 MHz XT Osc mode
20 MHz HS Osc mode

s LP Osc mode

ns HS Osc mode

ns EC Osc mode

ns XT Osc mode
200 s LP Osc mode
—
ns INTOSC mode
—
ns RC Osc mode
250 — 10,000 ns XT Osc mode
50 — 1,000 ns HS Osc mode
2
TCY _{Instruction Cycle Time}⁽¹⁾
200 TCY
DC
ns TCY = 4/FOSC
3 TosL, External CLKIN (OSC1) High 2* —
TosH External CLKIN Low
20* —
—
s LP oscillator, TOSC L/H duty cycle
—
ns HS oscillator, TOSC L/H duty
cycle
100 * —
—
ns XT oscillator, TOSC L/H duty cycle
4 TosR, External CLKIN Rise
TosF External CLKIN Fall
——
——
50* ns LP oscillator
25* ns XT oscillator
——
15* ns HS oscillator
* These parameters are characterized but not tested.
† Data in ‘Typ’ column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only
and are not tested.
Note 1: Instruction cycle period (TCY) equals four times the input oscillator time-base period. 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. All devices are tested to operate at ‘min’ values with an external
clock applied to OSC1 pin. When an external clock input is used, the ‘max’ cycle time limit is ‘DC’ (no clock)
for all devices.
 2003-2013 Microchip Technology Inc.
Preliminary
DS70091B-page 99