AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet

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AT89C51AC3

Manufacturer Part Number
AT89C51AC3
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of AT89C51AC3

Flash (kbytes)
64 Kbytes
Max. Operating Frequency
60 MHz
Cpu
8051-12C
Max I/o Pins
32
Spi
1
Uart
1
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
62.5
Sram (kbytes)
2.25
Eeprom (bytes)
2048
Self Program Memory
API
Operating Voltage (vcc)
3.0 to 5.5
Timers
4
Isp
UART
Watchdog
Yes
Active Errata List
Errata History
Errata Description
1. PCA
2. Timer0/1
Lot Number
All lots
PCA – Incorect Behavior with CPU X2 Mode Bit of HSB
Timer0/1 – Extra Interrupt
When starting the microcontroller in X2 mode upon reset with the X2 fuse bit of
the HSB, the PCA may not work properly when configured with Timer0 in X1
mode as clock input.
Workaround
Set the CPU in X2 mode by software by writing CKCON register at the begin of
the application.
When Timer0 is in X1 mode and Timer1 in X2 mode and vice versa, extra inter-
rupt may randomly occur for Timer0 or Timer1.
Workaround
Use the same mode for the two timers.
Incorect Behavior with CPU X2 Mode Bit of HSB
Extra Interrupt
Errata List
1, 2
C51
Microcontrollers
AT89C51AC3
Errata Sheet
4387A–8051–10/04
1

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AT89C51AC3 Summary of contents

Page 1

... Timer0/1 Extra Interrupt – When Timer0 mode and Timer1 in X2 mode and vice versa, extra inter- rupt may randomly occur for Timer0 or Timer1. Workaround Use the same mode for the two timers. C51 Microcontrollers AT89C51AC3 Errata Sheet 4387A–8051–10/04 1 ...

Page 2

... Fax: (81) 3-3523-7581 Disclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein ...

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