AT89C51AC3

Manufacturer Part NumberAT89C51AC3
ManufacturerAtmel Corporation
AT89C51AC3 datasheets
 

Specifications of AT89C51AC3

Flash (kbytes)64 KbytesMax. Operating Frequency60 MHz
Cpu8051-12CMax I/o Pins32
Spi1Uart1
Adc Channels8Adc Resolution (bits)10
Adc Speed (ksps)62.5Sram (kbytes)2.25
Eeprom (bytes)2048Self Program MemoryAPI
Operating Voltage (vcc)3.0 to 5.5Timers4
IspUARTWatchdogYes
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Active Errata List
PCA – Incorect Behavior with CPU X2 Mode Bit of HSB
Timer0/1 – Extra Interrupt
Errata History
Lot Number
Errata List
All lots
1, 2
Errata Description
1. PCA
Incorect Behavior with CPU X2 Mode Bit of HSB
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.
2. Timer0/1
Extra Interrupt
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.
C51
Microcontrollers
AT89C51AC3
Errata Sheet
4387A–8051–10/04
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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 ...