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ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SPDIP 28 8-Bit 4 MHz I/O number 22

 2001 Microchip Technology Inc. DS80088A-page 1

PIC16C73A

The PIC16C73A (Rev. A) parts you have received con-

form functionally to the Device Data Sheet

(DS30390E), except for the anomalies described

below.

All the problems listed here will be addressed in future

revisions of the PIC16C73A silicon.

1. Module: 8-bit A/D Module

If the Analog Port is configured so that all analog

pins are digital inputs (PCFG2:PCFG0 = 11x),

then doing a conversion on any pin of the analog

port will give a result of ADRES = 0xFF.

Work around

Configure the PCFG2:PCFG0 bits to a value that

has any pin of the analog port configured as an

analog input (such as PCFG2:PCFG0 = 100).

Conversion on any pin of the analog port (analog

or digital) will now convert as expected.

2. Module: CCP (Compare Mode)

The Compare mode may not operate as expected

when configuring the compare match to drive the

I/O pin low (CCPxM<3:0> = 1001).

When the CCP module is changed to compare

output low (CCPxM<3:0> = 1001) from any other

non-compare CCP mode, the I/O pin will immedi-

ately be driven low, regardless of the state of the

I/O data latch. The pin will remain low when the

compare match occurs (see Table 1).

However, when the CCP module is changed to

compare output high (CCPxM<3:0> = 1000) from

any other CCP mode, the I/O pin will immediately

be driven low, regardless of the state of the I/O

data latch. The pin will be driven high when the

compare match occurs.

TABLE 1: COMPARE OUTPUT LOW

SWITCHING

Work around

To have the I/O pin high until the compare match

low occurs, force a compare match high to get the

I/O pin into the high state, then reconfigure the

compare match to force the I/O low when the com-

pare condition occurs.

CCP Mode

CCPxM<3:0> =

I/O pin

State

Change CCP to

CCPxM<3:0> =

1001 1000

0xxx

HLL

LLL

1000

HH—

LL—

1001

H—L

L—L

101x

HLL

LLL

11xx

HLL

LLL

PIC16C73A Rev. A Silicon Errata Sheet

Summary of content (8 pages)

PAGE 1
PIC16C73A PIC16C73A Rev. A Silicon Errata Sheet The PIC16C73A (Rev. A) parts you have received conform functionally to the Device Data Sheet (DS30390E), except for the anomalies described below. All the problems listed here will be addressed in future revisions of the PIC16C73A silicon. TABLE 1: COMPARE OUTPUT LOW SWITCHING CCP Mode CCPxM<3:0> = I/O pin State 1001 1000 H L L L L L H H — L L — H — L L — L H L L L L L H L L L L L 1.
PAGE 2
PIC16C73A 3. Module: CCP (Compare Mode) EXAMPLE 1: The special event trigger of the Compare mode may not occur if both of the following conditions exist: • An instruction, one cycle (TCY) prior to a Timer1/Compare register match has literal data equal to the address of a CCP register being used.
PAGE 3
PIC16C73A 7. Module: Timer1 The Timer1 value may unexpectedly increment if either the TMR1H, or the TMR1L register is written. If Timer1 is ON and then turned OFF, performing any write instruction with TMR1H as the destination, may cause TMR1L to increment. EXAMPLE 2: 8. Module: USART When the USART (SCI) is configured in Asynchronous mode with the BRGH bit set, a high number of receive errors may be experienced.
PAGE 4
PIC16C73A Clarifications/Corrections to the Data Sheet: In the Device Data Sheet (DS30390E), the following clarifications and corrections should be noted. 1. Module: I/O Ports The specification for the High Voltage Open Drain I/O (parameter D150, the RA4 pin) cannot be met without possible long term reliability issues on that I/O pin. If a high voltage drive is required, use an external transistor that can support the required voltage. The new value is shown in Table 1. TABLE 1: Param No.
PAGE 5
PIC16C73A 3. Module: SSP (SPITM Mode Timing Specifications) The SPI interface timings (parameters 71, 71A, 72, 72A, 73, and 73A) have been modified. The new values are shown in Table 3. TABLE 3: Param No. DC SPECIFICATION CHANGES FROM DATA SHEET New Specification Sym.
PAGE 6
PIC16C73A 5. Module: RC Oscillator The table for RC Oscillator Frequencies in the Device Characterization section of the Data Sheet is incorrect. The correct characterization information is shown in Table 4. TABLE 4: RC OSCILLATOR FREQUENCIES CHARACTERIZATION CHANGES FROM DATA SHEET Correct Characterization Data Current Data Sheet Values REXT CEXT 22 pF 100 pF 330 pF Average % Variation Average % Variation 5.1 K 3.55 MHz ± 9.63% 4.12 MHz ± 1.4% 10 K 1.99 MHz ± 10.53% 2.35 MHz ± 1.
PAGE 7
“All rights reserved. Copyright © 2001, Microchip Technology Incorporated, USA. Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. 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.
PAGE 8
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