W78E58华邦芯片解密

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　　The W78E58 is an 8-bit microcontroller that is functionally compatible with the W78C58, except that the mask ROM is replaced by a flash EEPROM with a size of 32 KB. To facilitate programming and verification, the flash EEPROM inside the W78E58 allows the program memory to be programmed and read electronically. Once the code is confirmed, the user can protect the code for security.
　　The W78E58 microcontroller supplies a wider frequency range than most 8-bit microcontrollers on the market. It is functionally compatible with the industry-standard 80C52 microcontroller series, except that one extra 4-bit bit-addressable I/O port(Port 4) and two additional external interrupts (INT2,INT3).
　　The W78E58 contains four 8-bit bi-directional and bit-addressable I/O ports, three 16-bittimer/counters, and a serial port. These peripherals are supported by a eight-source, two-levelinterrupt capability. There are 256 bytes of RAM and an 32 KB flash EEPROM for application programs.
　　The W78E58 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.
　　8-bit CMOS microcontroller
　　Fully static design
　　Low standby current at full supply voltage
　　DC-40 MHz operation
　　256 bytes of on-chip scratchpad RAM
　　32 KB electrically erasable/programmable EPROM
　　64KB
　　program memory address space
　　64KB
　　data memory address space
　　Four 8-bit bidirectional 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
　　Boolean processor
　　Eight-source, two-level interrupt capability
　　Built-in power management
　　Code protection mechanism
　　Packages:
　　DIP 40: W78E58-16/24/40
　　PLCC 44: W78E58P-16/24/40
　　QFP 44: W78E58F-16/24/40
　　TQFP 44: W78E58M-16/24/40