PIC18F44J50 datasheet(3/12 Pages) MICROCHIP

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DS80436C-page 3

PIC18F46J50 FAMILY

Silicon Errata Issues

1. Module: Master Synchronous Serial Port

(MSSP1)

If the LATB<5> or LATB<4> bit is set, the

MSSP1 module will not work correctly in the

I2C™ modes. If both LATB<5> and LATB<4>

are clear, the module will work normally.

Work around

Clear the bits, LATB<5:4>, prior to enabling the

MSSP1 module in an I2C mode. Keep these bits

clear while using the module.

For operation in I2C modes, the TRISB<5:4>

bits should be set.

Affected Silicon Revisions

2. Module: Master Synchronous Serial Port

(MSSP)

In extremely rare cases, when configured for I2C™

slave reception, the MSSP module may not receive

the correct data. This occurs only if the Serial

Receive/Transmit Buffer Register (SSPxBUF) is not

read within a window after the SSPxIF interrupt

has occurred.

Work around

The issue can be resolved in either of these ways:

• Prior to the I2C slave reception, enable the

clock stretching feature.

This is done by setting the SEN bit

(SSPxCON2<0>).

• Each time the SSPxIF is set, read the

SSPxBUF before the first rising clock edge of

the next byte being received.

Affected Silicon Revisions

Note:

This document summarizes all silicon

errata issues from all revisions of silicon,

previous as well as current. Only the

issues indicated by the shaded column in

the following tables apply to the current

silicon revision (Rev. A4).

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