PIC16F684T-E/ST Microchip Technology, PIC16F684T-E/ST Datasheet

PIC16F684T-E/ST

Manufacturer Part Number

PIC16F684T-E/ST

Description

IC PIC MCU FLASH 2KX14 14TSSOP

Manufacturer

Microchip Technology

Series

PIC® 16Fr

Datasheets

1.PIC16F616T-ISL.pdf (8 pages)

2.PIC16F688T-ISL.pdf (688 pages)

3.PIC16F684-ISL.pdf (4 pages)

4.PIC16F684-ISL.pdf (192 pages)

5.PIC16F684-ISL.pdf (6 pages)

Specifications of PIC16F684T-E/ST

Core Processor

PIC

Core Size

8-Bit

Speed

20MHz

Peripherals

Brown-out Detect/Reset, POR, PWM, WDT

Number Of I /o

Program Memory Size

3.5KB (2K x 14)

Program Memory Type

FLASH

Eeprom Size

256 x 8

Ram Size

128 x 8

Voltage - Supply (vcc/vdd)

2 V ~ 5.5 V

Data Converters

A/D 8x10b

Oscillator Type

Internal

Operating Temperature

-40°C ~ 125°C

Package / Case

14-TSSOP

For Use With

XLT14SS-1 - SOCKET TRANSITION 14DIP/14SSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Connectivity

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Euro Chip Distribution

Part Number:

PIC16F684T-E/ST

Quantity:

900

Current page: 1 of 6
Download datasheet (171Kb)

The PIC16F684 parts you have received conform

functionally to the Device Data Sheet (DS41202D),

except for the anomalies described below.

Microchip intends to address all issues listed here in

future revisions of the PIC16F684 silicon.

1. Module: Resets (when WDT times out)

2. Module: Data EEPROM Memory

If the OPTION_REG bits, PS<2:0>, are clear,

multiple spurious Resets can occur when the WDT

times out. These Resets can occur even when the

PSA bit is clear, assigning the prescaler to the

Timer0.

Work around

If a CLRWDT instruction is issued before the WDT

times out and before the OPTION register is

modified, this problem is eliminated.

Date Codes that pertain to this issue:

All engineering and production devices.

The EEIF flag may be cleared inadvertently when

performing operations on the PIR1 register

simultaneously with the completion of an EEPROM

write. This condition occurs when the EEPROM

write timer completes at the same moment that the

PIR1 register operation is executed. Register

operations are those that have the PIR1 register as

the destination and include, but are not limited to,

BSF, BCF, ANDWF, IORWF and XORWF.

Work around

1. Avoid operations on the PIR1 register when

2. Poll the WR bit (EECON1<1>) to determine

3. Use a timer interrupt to catch any instances

writing to the EEPROM memory.

when the write is complete.

when the EEIF flag is inadvertently cleared.

The timer interrupt should be set longer than

8 ms. If EEIF fails, then the timer interrupt

occurs as a default time out. The WR and

WRERR flags are checked as part of the timer

interrupt service routine to verify the EEPROM

write success.

PIC16F684 Rev. A Silicon/Data Sheet Errata

3. Module: ECCP with Auto-Shutdown

4. If periodic interrupts are occurring in addition to

The PIC16F684 Rev. A4 silicon for the ECCP

Auto-Shutdown is connected to the C1IF and C2IF

flags. See Figures 8-2 and 8-3 on the following

page.

Rev. A4’s auto-shutdown connection to C1IF and

C2IF causes the auto-shutdown to incorrectly

operate synchronously. Additionally, reads of

CMCON0 will incorrectly clear an auto-shutdown

event.

Work around

Rev. A4 Silicon

Fix

Rev. B2 Silicon

The Silicon Rev. B2 device (now shipping) has

moved the auto-shutdown connection from CxIF to

CxOUT. This will eliminate the synchronous

shutdown and simplify the use of the comparator

for a shutdown event. Figure 1 shows the function

of auto-shutdown before and after the device

revision.

the EEIF interrupts, then use a secondary flag

to sense write completion. The secondary flag

is set whenever EEPROM writes are active. An

EEPROM write completion is indicated when

the secondary flag is set and the WR flag is

clear.

PIC16F684

Poll the CxOUT bit until it is low.

Read CMCON1 to precondition CxIF.

If CMCON0 is read while CxOUT is changing,

repeat steps 1 and 2.

(Silicon Rev. A4 and B2)

DS80197E-page 1

Related parts for PIC16F684T-E/ST

PIC16F684T-E/ST Summary of contents

Page 1

... The WR and WRERR flags are checked as part of the timer interrupt service routine to verify the EEPROM write success. © 2006 Microchip Technology Inc. PIC16F684 4. If periodic interrupts are occurring in addition to the EEIF interrupts, then use a secondary flag to sense write completion ...

Page 2

... RD CMCON0 D Q Q3*RD CMCON0 EN CL Reset ). OSC To C1OUT pin Rev ECCP Auto-Shutdown To Data Bus Set C1IF bit Rev ECCP Auto-Shutdown To Timer1 Gate 0 To C2OUT pin 1 Rev ECCP Auto-Shutdown To Data Bus Set C2IF bit Rev ECCP Auto-Shutdown © 2006 Microchip Technology Inc. ...

Page 3

... FIGURE 1: SILICON REVISION A4 VS. REVISION B2 A4 CCP Output B2 CCP Output CxOUT CxIF Uncertainty due to Q1 cycle delay © 2006 Microchip Technology Inc. Read CMCON0 Uncertainty due to Q1 cycle delay PIC16F684 Read CMCON0 DS80197E-page 3 ...

Page 4

... Data Sheet Clarifications/Corrections Section: Added Module 2: New 4x4 QFN Package added. Rev E Document (7/2006) Added Module 3: ECCP with Auto-Shutdown (Silicon Rev. A4 and B2). Clarifications/Corrections to the Data Sheet: Removed Items 1 and 2, which have been incorporated into the data sheet. © 2006 Microchip Technology Inc. ...

Page 5

... Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...

Page 6

... Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2006 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-3910 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...

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