Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller PDIP 8 8-Bit 10 MHz I/O number 5

100

PIC12C67X

DS30561C-page 100  1997-2013 Microchip Technology Inc.

12.6 Timing Diagrams and Specifications

FIGURE 12-5: EXTERNAL CLOCK TIMING

TABLE 12-1: CLOCK TIMING REQUIREMENTS

Parameter

No.

Sym Characteristic Min Typ† Max Units Conditions

OSC External CLKIN Frequency

(Note 1)

DC — 4 MHz XT and EXTRC osc mode

DC — 4 MHz HS osc mode (PIC12CE67X-04)

DC — 10 MHz HS osc mode (PIC12CE67X-10)

DC — 200 kHz LP osc mode

Oscillator Frequency

(Note 1)

DC — 4 MHz EXTRC osc mode

.455 — 4 MHz XT osc mode

4 — 4 MHz HS osc mode (PIC12CE67X-04)

4 — 10 MHz HS osc mode (PIC12CE67X-10)

5 — 200 kHz LP osc mode

OSC External CLKIN Period

(Note 1)

250 — — ns XT and EXTRC osc mode

250 — — ns HS osc mode (PIC12CE67X-04)

100 — — ns HS osc mode (PIC12CE67X-10)

5— — s LP osc mode

Oscillator Period

(Note 1)

250 — — ns EXTRC osc mode

250 — 10,000 ns XT osc mode

250 — 250 ns HS osc mode (PIC12CE67X-04)

100 — 250 ns HS osc mode (PIC12CE67X-10)

5— — sLP osc mode

CY Instruction Cycle Time (Note 1) 400 — DC ns TCY = 4/FOSC

3 TosL,

Tos H

External Clock in (OSC1) High

or Low Time

50 — — ns XT oscillator

2.5 — — s LP oscillator

10 — — ns HS oscillator

4TosR,

Tos F

External Clock in (OSC1) Rise

or Fall Time

— — 25 ns XT oscillator

— — 50 ns LP oscillator

— — 15 ns HS oscillator

† 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 (T

CY) 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 exe-

cuting 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

the OSC1/CLKIN pin.

When an external clock input is used, the "Max." cycle time limit is "DC" (no clock) for all devices. OSC2 is discon-

nected (has no loading) for the PIC12C67X.

OSC1

CLKOUT

Q4 Q1 Q2 Q3 Q4 Q1