8-bit MCU Series (80C51-based)

Part No.	W79E658A/W79L658A
Datasheet	W79E658A_W79L658A.pdf
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	N/A
Package	DEVICE OPERATING FREQUENCY OPERATING VOLTAGE PACKAGE LEAD FREE(ROHS) W79E658A40PL up to 40MHz 4.5V ~ 5.5V PLCC100 W79E658A40PL up to 25MHz 3.0V ~ 5.5V PLCC100
Other Files	N/A
Development Tools	N/A
Others	N/A