DS80C320

Features:

80C32-Compatible 
-  8051 pin and instruction set compatible
-  Four 8-bit I/O ports
-  Three 16-bit timer/counters
-  256 bytes scratchpad RAM
-  Addresses 64 kB ROM and 64 kB RAM
High-speed architecture
-  4 clocks/machine cycle (8032=12)
-  DC to 33 MHz (DS80C320)
-  DC to 18 MHz (DS80C323)
-  Single-cycle instruction in 121 ns
-  Uses less power for equivalent work
-  Dual data pointer
-  Optional variable length MOVX to access fast/slow RAM/peripherals
High integration controller includes: 
-  Power- fail reset
-  Programmable watchdog timer
-  Early-warning power- fail interrupt
Two full -duplex hardware serial ports
13 total interrupt sources with six external 
Available in 40-pin DIP, 44-pin PLCC and TQFP


Specifications

Voltage on Any Pin Relative to Ground        -0.3V to (VCC + 0.5V)
Voltage on VCC Relative to Ground                       -0.3V to +6.0V
Operating Temperature                                     -40°C to +85°C
Storage Temperature                                      -55°C to +125°C
Soldering Temperature                              160°C for 10 seconds
 
*  This is a stress rating only and functional operation of the device at these or any other  conditions
above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. 


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.