W79E825A/824A/823B/822B Data Sheet
1
GENERAL DESCRIPTION
The W79E825 series are an 8-bit Turbo 51 microcontroller which has an in-system programmable
Flash EPROM which Flash EPROM can program by ICP (In Circuit Program) or by
hardware
writer.
The instruction set of the W79E825 series are fully compatible with the standard 8052. The W79E825
series contain a
16K/8K/4K/2K
bytes of main Flash EPROM; a
256/128
bytes of RAM;
256/128
bytes
NVM Data Flash EPROM; two 8-bit bi-directional, one 2-bit bi-directional and bit-addressable I/O
ports; two 16-bit timer/counters; 4-channel multiplexed 10-bit A/D convert; 4-channel 10-bit PWM; two
serial ports that include a I2C and an enhanced full duplex serial port. These peripherals are
supported by 13 sources four-level interrupt capability. To facilitate programming and verification, the
Flash EPROM inside the W79E825 series allow the program memory to be programmed and read
electronically. Once the code is confirmed, the user can protect the code for security.
-4-
WINBOND [ WINBOND ]
