DS80C320 datasheet(2/42 Pages) DALLAS

2 / 42 page

DS80C320/DS80C323

2 of 42

DESCRIPTION

The DS80C320/DS80C323 is a fast 80C31/80C32-compatible microcontroller. Wasted clock and

memory cycles have been removed using a redesigned processor core. As a result, every 8051 instruction

is executed between 1.5 and 3 times faster than the original for the same crystal speed. Typical

applications will see a speed improvement of 2.5 times using the same code and same crystal. The

DS80C320 offers a maximum crystal rate of 33 MHz, resulting in apparent execution speeds of 82.5 MHz

(approximately 2.5X).

The DS80C320/DS80C323 is pin-compatible with all three packages of the standard 80C32 and offers the

same timer/counters, serial port, and I/O ports. In short, the device is extremely familiar to 8051 users but

provides the speed of a 16-bit processor.

The DS80C320 provides several extras in addition to greater speed. These include a second full hardware

serial port, seven additional interrupts, programmable watchdog timer, power-fail interrupt and reset. The

device also provides dual data pointers (DPTRs) to speed block data memory moves. It can also adjust the

speed of off-chip data memory access to between two and nine machine cycles for flexibility in selecting

memory and peripherals.

The DS80C320 operating voltage ranges from 4.25V to 5.5V, making it ideal as a high-performance

upgrade to existing 5V systems. For applications in which power consumption is critical, the DS80C323

offers the same feature set as the DS80C320, but with 2.7V to 5.5V operation.

ORDERING INFORMATION

PART NUMBER

PACKAGE

MAX CLOCK SPEED

TEMPERATURE RANGE

DS80C320-MCG

40-pin plastic DIP

25 MHz

0°C to +70°C

DS80C320-QCG

44-pin PLCC

25 MHz

0°C to +70°C

DS80C320-ECG

44-pin TQFP

25 MHz

0°C to +70°C

DS80C320-MNG

40-pin plastic DIP

25 MHz

-40°C to +85°C

DS80C320-QNG

44-pin PLCC

25 MHz

-40°C to +85°C

DS80C320-ENG

44-pin TQFP

25 MHz

-40°C to +85°C

DS80C320-MCL

40-pin plastic DIP

33 MHz

0°C to +70°C

DS80C320-QCL

44-pin PLCC

33 MHz

0°C to +70°C

DS80C320-ECL

44-pin TQFP

33 MHz

0°C to +70°C

DS80C320-MNL

40-pin plastic DIP

33 MHz

-40°C to +85°C

DS80C320-QNL

44-pin PLCC

33 MHz

-40°C to +85°C

DS80C320-ENL

44-pin TQFP

33 MHz

-40°C to +85°C

DS80C323-MCD

40-pin plastic DIP

18 MHz

0°C to +70°C

DS80C323-QCD

44-pin PLCC

18 MHz

0°C to +70°C

DS80C323-ECD

44-pin TQFP

18 MHz

0°C to +70°C

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