T89C5115 ATMEL Corporation, T89C5115 Datasheet - Page 15

• Manufacturer Part Number: T89C5115
• Description: Low Pin Count 8-bit MCU with A/D Converter and 16-Kbytes of Flash Memory
• Manufacturer: ATMEL Corporation

Figure 4. Mode Switching Waveforms
Note:
4128A–8051–04/02
In order to prevent any incorrect operation while operating in the X2 mode, users must be aware that all peripherals using the
clock frequency as a time reference (UART, timers...) will have their time reference divided by two. For example a free running
timer generating an interrupt every 20 ms will then generate an interrupt every 10 ms. A UART with a 4800 baud rate will have
a 9600 baud rate.
XTAL1
XTAL2
X2 bit
CPU
clock
STD
Mode
X2
Mode
STD
Mode
T89C5115
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