P87C51RC2BBD,157

Microcontrollers Overview

The P87C51RC2BBD,157 is an 8-bit microcontroller from the Philips/NXP 80C51 family. It features 32 kbytes of One-Time Programmable (OTP) memory and 512 bytes of RAM. Operating at low voltage levels between 2.7 V and 5.5 V, it supports clock speeds up to 30 MHz in 6-clock mode and 33 MHz in 12-clock mode. The device includes four 8-bit I/O ports, three 16-bit timers/counters, a full-duplex enhanced UART, and a Programmable Counter Array for PWM and capture/compare functions.

Microcontrollers Feature Summary

• Compatible with the standard 80C51 instruction set while offering accelerated performance through selectable 6-clock or 12-clock operation modes.
• Integrates a Programmable Counter Array supporting pulse width modulation and capture/compare capabilities for precise timing control.
• Includes an enhanced full-duplex UART with framing error detection and automatic address recognition for robust serial communication.
• Provides multiple power management options including idle mode, stop clock mode, and power-down mode with wake-up capability.

Microcontrollers Applications

• Motor control systems requiring high-speed I/O and up/down counting capabilities
• Embedded applications needing pulse width modulation for actuator regulation
• Industrial control units utilizing extended temperature ranges and low power consumption
• General-purpose microcontroller designs compatible with standard 80C51 software ecosystems

Microcontrollers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Confirm that the OTP programming requirements align with available parallel programming hardware interfaces. Ensure voltage supply stability within the specified 2.7 V to 5.5 V range during operation to maintain functional integrity.

Microcontrollers Selection Notes

Select this component when a design requires 32 kbytes of non-volatile code storage combined with 512 bytes of data RAM. Choose this variant over others in the family if the application demands the specific LQFP package configuration. Consider the 6-clock mode acceleration if higher processing throughput is necessary compared to standard 12-clock operation.

Microcontrollers Part Context

This part belongs to the P87C51RA2/RB2/RC2/RD2 series of single-chip 8-bit microcontrollers manufactured using advanced CMOS technology. The RC2 designation specifically indicates the 32 kbyte OTP memory capacity within this derivative line. These devices are designed as direct upgrades to legacy 80C51 architectures with added peripheral features.

Microcontrollers Replacement Considerations

P87C51RB2BBD,157

Microcontrollers FAQ

How is the CPU clock speed configured between 6-clock and 12-clock modes?

The clock mode can be selected via software using the X2 bit in the Clock Control Register (CKCON) or permanently programmed into an OTP bit (OX2) using parallel programming equipment.

What mechanism allows the device to exit Power-Down mode?

The device can exit Power-Down mode either through a hardware reset or by an external interrupt on INT0 or INT1 pins, provided they are enabled and configured as level-sensitive.