Datasheet > W78E51-40

W78E51-40

更新时间： 2024-11-19 23:41:39

品牌	Logo	应用领域
其他 - ETC		微控制器
页数	文件大小	规格书
22页	302K
描述
8-Bit Microcontroller

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数据手册

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W78E51-40 数据手册

Preliminary W78E52B

8-BIT MTP MICROCONTROLLER

GENERAL DESCRIPTION

The W78E52B is an 8-bit microcontroller which can accommodate a wider frequency range with low

power consumption. The instruction set for the W78E52B is fully compatible with the standard 8051.

The W78E52B contains an 8K bytes MTP ROM (Multiple-Time Programmable ROM); a 256 bytes

RAM; four 8-bit bi-directional and bit-addressable I/O ports; an additional 4-bit I/O port P4; three 16-

bit timer/counters; a hardware watchdog timer and a serial port. These peripherals are supported by

eight sources two-level interrupt capability. To facilitate programming and verification, the MTP-ROM

inside the W78E52B allows the program memory to be programmed and read electronically. Once

the code is confirmed, the user can protect the code for security.

The W78E52B microcontroller has two power reduction modes, idle mode and power-down mode,

both of which are software selectable. The idle mode turns off the processor clock but allows for

continued peripheral operation. The power-down mode stops the crystal oscillator for minimum power

consumption. The external clock can be stopped at any time and in any state without affecting the

processor.

FEATURES

· Fully static design 8-bit CMOS microcontroller

· Wide supply voltage of 4.5V to 5.5V

· 256 bytes of on-chip scratchpad RAM

· 8 KB electrically erasable/programmable MTP-ROM

· 64 KB program memory address space

· 64 KB data memory address space

· Four 8-bit bi-directional ports

· One extra 4-bit bit-addressable I/O port, additional INT2 / INT3

(available on 44-pin PLCC/QFP package)

· Three 16-bit timer/counters

· One full duplex serial port(UART)

· Watchdog Timer

· Eight sources, two-level interrupt capability

· EMI reduction mode

· Built-in power management

· Code protection mechanism

· Packages:

- DIP 40: W78E52B-24/40

- PLCC 44: W78E52BP-24/40

- PQFP 44: W78E52BF-24/40

Publication Release Date: December 1998

- 1 -

Revision A1

12 3 4 5 6 7...22

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