Spot sales of P80C31BH1 CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER DIP-40

Product Descriptions

The MCSÉ 51 CHMOS microcontroller products are fabricated on Intel’s reliable CHMOS process and are functionally compatible with the standard MCS 51 HMOS microcontroller products. This technology combines the high speed and density characteristics of HMOS with the low power attributes of CHMOS. This combination expands the effectiveness of the powerful MCS 51 microcontroller architecture and instruction set.

Like the MCS 51 HMOS microcontroller versions, the MCS 51 CHMOS microcontroller products have the following features: 4 Kbytes of EPROM/ROM (87C51/80C51BH respectively); 128 bytes of RAM; 32 I/O lines; two 16-bit timer/counters; a five-source two-level interrupt structure; a full duplex serial port; and on-chip oscillator and clock circuitry. In addition, the MCS 51 CHMOS microcontroller products exhibit low operating power, along with two software selectable modes of reduced activity for further power reductionÐIdle and Power Down.

The Idle mode freezes the CPU while allowing the RAM, timer/counters, serial port, and interrupt system to continue functioning. The Power Down mode saves the RAM contents but freezes the oscillator, causing all other chip functions to be inoperative.

The 87C51 is the EPROM version of the 80C51BH. It contains 4 Kbytes of on-chip program memory that can be electrically programmed, and can be erased by exposure to ultraviolet light. The 87C51 EPROM array uses a modified Quick-Pulse Programming algorithm, by which the entire 4 Kbyte array can be programmed in about 12 seconds.

Product Features

Y Extended Automotive Temperature Range (b40§C to a125§C Ambient)

Y High Performance CHMOS Process

Y Power Control Modes

Y 4 Kbyte On-Chip ROM/EPROM

Y 128 x 8-bit RAM

Y 32 Programmable I/O Lines

Y Two 16-Bit Timer/Counters

Y 5 Interrupt Sources

Y Quick-Pulse EPROM Programming

Y 2-Level Program Memory Lock EPROM

Y Boolean Processor

Y Programmable Serial Port

Y TTL- and CMOS-Compatible Logic Levels

Y 64K External Program Memory Space

Y 64K External Data Memory Space

Y IDLE and POWER DOWN Modes

Y ONCE Mode Facilitates System Testing

Y Available in 12 MHz and 16 MHz Versions

Y Available in PLCC and DIP Packages

Product Photos

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