PIC16C662

更新时间： 2024-10-04 21:54:55

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美国微芯 - MICROCHIP		/
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PIC16C662 Rev. A Silicon Errata Sheet

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PIC16C662 数据手册

PIC16C662

PIC16C662 Rev. A Silicon Errata Sheet

The PIC16C662 (Rev. A) parts you have received con-

form functionally to the Device Data Sheet (DS30559A),

except for the anomalies described below.

All the problems listed here will be addressed in future

revisions of the PIC16C662 silicon.

1. Module:Timer0

The TMR0 register may increment when the WDT

postscaler is switched to the Timer0 prescaler. If

TMR0 = FFh, this will cause TMR0 to overﬂow (set-

ting T0IF).

Work Around

Follow the following sequence:

a) Read the 8-bit TMR0 register into the W register

b) Clear the TMR0 register

c) Assign WDT postscaler to Timer0

d) Write W register to TMR0

2. Programming: Code Protect Bits

The user could see the following error messages

when using PROMATE to program the devices. The

messages are for the conﬁguration bits only.

Work Around

a) After a program or verify, there could be an indica-

tion that there was a conﬁg. bit error. If the error

box shows all conﬁguration bits as correct but does

not show the code protect bits (CP), then the

device was properly programmed but code protect

will not operate.

b) When reading in a part, you may get an error that

indicates that the code protect bits are invalid and

the device is unusable. Again, the device was

properly programmed but code protect will not

operate.

In both cases, the part was programmed correctly

but code protect will not operate.

Note: As with any windowed EPROM device, please cover the window at all times, except when erasing.

1998 Microchip Technology Inc.

DS30559A/C662/E2A1-page 1

12 3 4

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