PIC16C717/770/771 PIC16C717/770/771 Rev. C Silicon/Data Sheet Errata The PIC16C717/770/771 parts you have received conform functionally to the Device Data Sheet (DS41120B), except for the anomalies described below. All problems listed here will be addressed in future revisions of the PIC16C717/770/771 silicon. 1. Module: A/D Converter Exception to Table 15-12, Parameter A04. PIC16C770/771 (12-bit A/D): No missing codes to 11-bits of resolution, up to 4 non-consecutive missing codes may occur when used to 12-bits of resolution. Work around None. 2. Module: Timer1 When Timer1 is configured to operate as an asynchronous counter, care must be taken that there is no incoming pulse while the module is being turned off. If an incoming pulse arrives while Timer1 is being turned off (i.e., TMR1ON transitions from 1 to 0), the value of registers TMR1L and TMR1H will be unpredictable. Work around This solution involves changing Timer1 from Asynchronous to Synchronous mode before turning off Timer1. No additional resources are required for this solution. Timer1 synchronization will start, effectively stopping Timer1, one Q period after the Synchronous mode is enabled, or one Q period later than would have been realized by simply clearing the TMR1ON bit. One additional count, in excess of the counts accrued during this extra Q period, may be accumulated before the TMR1ON bit is eventually cleared in the next instruction. The occurrence of this additional count is dependent on the phase relationship between OSC1, or the internal system clock, and T1CKI. CODE EXAMPLE : ************************************************************************************** ; Call this routine to stop Timer1 asynchronous counting ; ; Timer1 is stopped after the timer is changed to synchronous mode ; The captured timer value resides in TMR1H and TMR1L at the completion of this ; routine. TMR1Capture bcf T1CON,NOT_T1SYNC bcf T1CON,TMR1ON bsf T1CON,NOT_T1SYNC return 2002 Microchip Technology Inc. ; ; ; ; ; entry point set for synchronous mode stop timer restore asynchronous mode return to calling routine DS80100C-page 1 PIC16C717/770/771 3. Module: ECCP (Compare Mode) The apparent inverted response will persist until the CCP1CON<3> bit is cleared (exiting Compare mode). Interrupts always occur correctly on the match condition. The error is only in the state of the CCP1 output latch. The CCP1 output latch, observed on RB3/CCP1/ P1A, can change unexpectedly when the ECCP module is changed from a set output on match (CCP1CON<3:0> = “1000”) to clear output on match (CCP1CON<3:0> = “1001”) or vice versa. This condition will occur, following an ECCP Reset, at the third iteration of the following sequence: 1. CCPR1<3:0> is changed from “1001” to “1000” or vice versa. 2. The TMR1H:TMR1L register pair matches the CCP1R1H:CCPR1L register pair. Work around Option 1 Use the ECCP toggle output on compare match mode (CCP1CON<3:0> = “0010”). Option 2 Do not selectively change the CCP1CON<0> bit. Instead, perform the following: • Set the RB3 data latch to the same state as the CCP1 output latch (movf PORTB, f) to avoid an output glitch when the CCP1CON register is cleared. • Next, clear the CCP1CON register (clrf CCP1CON). • Finally, set the CCP1CON<3:0> bits to the next desired output on Compare Match mode. Step 1 of the third iteration will cause the CCP1 output latch to immediately, and erroneously, change to the inverse of the CCPR1<0> bit. This gives the appearance of an inverted ECCP response to the third, and subsequent, compare match events. TABLE 1: DC SPECIFICATION DEVIATIONS FROM DATA SHEET Param No. D005 Sym. Characteristic VBOR BOR Voltage Tested Specification Data Sheet Specification Units Min Typ Max Min Typ Max BORV<1:0> = 0100 2.35 — 2.80 2.5 — 2.66 BORV<1:0> = 0101 2.55 — 3.02 2.7 — 2.86 V BORV<1:0> = 0110 3.95 — 4.71 4.2 — 4.46 V BORV<1:0> = 0111 4.23 — 5.05 4.5 — 4.78 V V TABLE 2: DC SPECIFICATION DEVIATIONS FROM DATA SHEET Param No. D420 Sym. VLVD LVD Voltage DS80100C-page 2 Characteristic Tested Specification Data Sheet Specification Units Min Typ Max Min Typ Max LVV<3:0> = 0100 2.35 — 2.80 2.5 — 2.66 V LVV<3:0> = 0101 2.55 — 3.02 2.7 — 2.86 V LVV<3:0> = 0110 2.64 — 3.14 2.8 — 2.98 V LVV<3:0> = 0111 2.83 — 3.37 3.0 — 3.2 V LVV<3:0> = 1000 3.11 — 3.71 3.3 — 3.52 V LVV<3:0> = 1001 3.29 — 3.93 3.5 — 3.72 V LVV<3:0> = 1010 3.39 — 4.04 3.6 — 3.84 V LVV<3:0> = 1011 3.58 — 4.26 3.8 — 4.04 V LVV<3:0> = 1100 3.77 — 4.49 4.0 — 4.26 V LVV<3:0> = 1101 3.95 — 4.71 4.2 — 4.46 V LVV<3:0> = 1110 4.23 — 5.05 4.5 — 4.78 V 2002 Microchip Technology Inc. PIC16C717/770/771 Clarifications/Corrections to the Data Sheet: In the Device Data Sheet (DS41120B), the following clarifications and corrections should be noted. 1. Module: DC Characteristics Figure 15-1: TPIC16C717/770/771 VOLTAGEFREQUENCY GRAPH, -40°C ≤ TA ≤ +85°C; Figure title changes from +85°C to +125°C. 2. Module: DC Characteristics Figure 15-3: PIC16LC717/770/771 VOLTAGE- FREQUENCY GRAPH, -40°C ≤ TA ≤ 0°C, +70°C ≤ TA ≤ +85°C; Figure title changes from +85°C to +125°C. 2002 Microchip Technology Inc. DS80100C-page 3 PIC16C717/770/771 REVISION HISTORY Rev A Document (2/01) Original errata document. Issues 1 (A/D Converter) and 2 (Timer1 Module) were added (page 1). Item 1, Table 5-12 concerning Parameter A04, was added (page 2). Rev B Document (9/01) Issue 3 (ECCP Compare Mode), Table 1 and 2 were added (page 2). Under the Clarifications/Corrections Section, Item 1, Table 15-12 was updated with additional information (page 3). Under the Clarifications/Corrections Section, the following Items were added: Item 2, Table 15-15 concerning DC Characteristics for PIC16C717 and PIC16LC717 was updated (page 4). Item 3, Section 15.1 and Section 15.2 concerning DC Characteristics for PIC16C717/770/771 and PIC16LC717/770/771, respectively were replaced with a new Section, which contains updated information in a new format (page 5). Item 4, Table 15-11 concerning DC Characteristics for VREF was replaced with updated information (page 8). Rev C Document (8/02) Under the Data Sheet Clarifications/Corrections Section, Items 1 through 4 were incorporated into DS41120B. New Items 1 and 2 were added for clarification. DS80100C-page 4 2002 Microchip Technology Inc. Note the following details of the code protection feature on PICmicro® MCUs. • • • • • • The PICmicro family meets the specifications contained in the Microchip Data Sheet. Microchip believes that its family of PICmicro microcontrollers is one of the most secure products of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the PICmicro microcontroller in a manner outside the operating specifications contained in the data sheet. The person doing so may be engaged in theft of intellectual property. Microchip is willing to work with the customer who is concerned about the integrity of their code. Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable”. Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our product. If you have any further questions about this matter, please contact the local sales office nearest to you. Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, KEELOQ, MPLAB, PIC, PICmicro, PICSTART and PRO MATE are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, microID, MXDEV, MXLAB, PICMASTER, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. dsPIC, dsPICDEM.net, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. Serialized Quick Turn Programming (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. © 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 and Mountain View, California in March 2002. The Company’s quality system processes and procedures are QS-9000 compliant for its PICmicro® 8-bit MCUs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, non-volatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001 certified. 2002 Microchip Technology Inc. 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