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AT90LS2343-4SC Datasheet(PDF) 4 Page - ATMEL Corporation |
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AT90LS2343-4SC Datasheet(HTML) 4 Page - ATMEL Corporation |
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4 / 64 page  4 AT90S/LS2323/2343 1004D–09/01 chip, the Atmel AT90S2323/2343 is a powerful microcontroller that provides a highly flexible and cost-effective solution to many embedded control applications. The AT90S2323/2343 AVR is supported with a full suite of program and system devel- opment tools including: C compilers, macro assemblers, program debugger/simulators, in-circuit emulators and evaluation kits. Comparison between AT90S/LS2323 and AT90S/LS2343 The AT90S/LS2323 is intended for use with external quartz crystal or ceramic resonator as the clock source. The start-up time is fuse-selectable as either 1 ms (suitable for ceramic resonator) or 16 ms (suitable for crystal). The device has three I/O pins. The AT90S/LS2343 is intended for use with either an external clock source or the inter- nal RC oscillator as clock source. The device has five I/O pins. Table 1 summarizes the differences in features of the two devices. Pin Descriptions AT90S/LS2323 VCC Supply voltage pin. GND Ground pin. Port B (PB2..PB0) Port B is a 3-bit bi-directional I/O port with internal pull-up resistors. The Port B output buffers can sink 20 mA. As inputs, Port B pins that are externally pulled low, will source current if the pull-up resistors are activated. Port B also serves the functions of various special features. Port pins can provide internal pull-up resistors (selected for each bit). The Port B pins are tri-stated when a reset condition becomes active. RESET Reset input. An external reset is generated by a low level on the RESET pin. Reset pulses longer than 50 ns will generate a reset, even if the clock is not running. Shorter pulses are not guaranteed to generate a reset. XTAL1 Input to the inverting oscillator amplifier and input to the internal clock operating circuit. XTAL2 Output from the inverting oscillator amplifier. Table 1. Feature Difference Summary Part AT90S/LS2323 AT90S/LS2343 On-chip Oscillator Amplifier yes no Internal RC Clock no yes PB3 available as I/O pin never internal clock mode PB4 available as I/O pin never always Start-up time 1 ms/16 ms 16 µs fixed |
Similar Part No. - AT90LS2343-4SC |
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Similar Description - AT90LS2343-4SC |
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