87C453

Features:

*80C51 based architecture
*Seven 8-bit I/O ports
*Port 6 features:
  Eight data pins
  Four control pins
  Direct MPU bus interface
  ISA Bus Interface
  Parallel printer interface
  IBF and OBF interrupts
  A flag latch on host write
*On the microcontroller:
  8k * 8 EPROM
     Quick pulse programming algorithm
     Two-level program security system
  256 * 8 RAM
  Two 16-bit counter/timers
  Two external interrupts
*External memory addressing capability
   64k ROM and 64k RAM
*Low power consumption:
  Normal operation: less than 24mA at 5V, 16MHz
  Idle mode
  Power-down mode
*Reduced EMI
*Full-duplex enhanced UART
  Framing error detection
  Automatic address recognition


Pinout




Specifications

PARAMETER	RATING	UNIT
Operating temperature under bias	0 to +70
Storage temperature range	65 to+150
Voltage on any other pin to VSS	-0.5 to +6.5	V
Power dissipation (based on package heat transfer limitations, not device power consumption)	1.5	W

NOTES:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section of this specification is not implied.
2. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maxima.
3. Parameters are valid over operating temperature range unless otherwise specified. Voltages are with respect to V_SS  unless otherwise noted.


Description

The Philips 8XC453 is an I/O expanded single-chip microcontroller fabricated with Philips high-density CMOS technology. Philips epitaxial substrate minimizes latch-up sensitivity.
The 8XC453 is a functional extension of the 87C51 microcontroller with three additional I/O ports and four I/O control lines. The 8XC453 is available in 68-pin LCC packages. Four control lines associated with port 6 facilitate high-speed asynchronous I/O functions.
The 87C453 includes an 8k × 8 EPROM, a 256 × 8 RAM, 56 I/O lines, two 16-bit timer/counters, a seven source, two priority level, nested interrupt structure, a serial I/O port for either a full duplex UART, I/O expansion, or multi-processor communications, and on-chip oscillator and clock circuits.
The 87C453 has two software selectable modes of reduced activity for further power reduction; idle mode and power-down mode. Idle mode freezes the CPU while allowing the RAM, timers, serial port, and interrupt system to continue functioning. Power-down mode freezes the oscillator, causing all other chip functions to be inoperative while maintaining the RAM contents.