80C51 Microcontroller - 4T

Part No.

W79E658A/W79L658A

Datasheet

Description

The W79E658 is a fast, 8051/52-compatible microcontroller with a redesigned processor core that eliminates wasted clock and memory cycles. Typically, the W79E658 executes instructions 1.5 to 3 times faster than that of the traditional 8051/52, depending on the type of instruction, and the overall performance is about 2.5 times better at the same crystal speed. As a result, with the fully-static CMOS design, the W79E658 can accomplish the same throughput with a lower clock speed, reducing power consumption.
The W79E658 provides 256 bytes of on-chip RAM; 1-KB of auxiliary RAM; seven 8-bit, bi-directional and bit-addressable I/O ports; an additional 4-bit port P4; three 16-bit timer/counters; an UART serial port, 2 channels of I²C with master/slave capability and 8 channels of 10-bit ADC. These peripherals are all supported by ten interrupt sources with 2 levels of priority.
The W79E658 contains a 128-KB Flash EPROM whose contents may be updated in-system by a loader program stored in an auxiliary, 4-KB Flash EPROM. Once the contents are confirmed, it can be protected for security.

Features

• Fully-static-design 8-bit Turbo 51 CMOS microcontroller up to 40MHz
• 128-KB of in-system-programmable Flash EPROM (AP Flash EPROM with ISP)
• 4-KB of Auxiliary Flash EPROM for the loader program (LD Flash EPROM)
• 1-KB auxiliary RAM, software-selectable, accessed by MOVX instruction
• 256 bytes of scratch-pad RAM
•Seven 8-bit bi-directional ports; Port 0 has internal pull-up resisters enabled by software.
•All pins with Schmitt trigger inputs
•One 4-bit multipurpose I/O port4 with Chips select(CS) and boot function
•Three 16-bit timers
•6 channels of 8-bit PWM
•One enhanced full-duplex UART with framing-error detection and automatic address recognition
•2-channels of I²C with master/slave capability
•10-bit ADC with 8-channel inputs
•Software programmable access cycle to external RAM/peripherals
•10 interrupt sources with two levels of priority
• Software reset function
•Optional H/L state of ALE/PSEN during power down mode
• Built-in power management
•Code protection
•Development tool
— JTAG ICE(In Circuit Emulator) tool

Diagram

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Package

DEVICE	OPERATING FREQUENCY	OPERATING VOLTAGE	PACKAGE
DEVICE	OPERATING FREQUENCY	OPERATING VOLTAGE	LEAD FREE(ROHS)
W79E658A40PL	up to 40MHz	4.5V ~ 5.5V	QFP100
W79L658A40PL	up to 25MHz	3.0V ~ 5.5V	QFP100

Other Files

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Development Tools

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Others

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