W78E365/W78E365A
1. GENERAL DESCRIPTION
The W78E365 is an 8-bit microcontroller which has an in-system programmable Flash EPROM for
firmware updating. The instruction set of the W78E365 is fully compatible with the standard 8052. The
W78E365 contains a 64K bytes of main Flash APROM and a 4K bytes of auxiliary Flash LDROM
which allows the contents of the 64KB main APROM to be updated by the loader program located at
the LDROM; 256+1K bytes of on-chip RAM; four 8-bit bi-directional and bit-addressable I/O ports; an
additional 4-bit port P4; three 16-bit timer/counters; a serial port. These peripherals are supported by a
eight sources two-level interrupt capability. To facilitate programming and verification, the ROM inside
the W78E365 allows the program memory to be programmed and read electronically. Once the code
is confirmed, the user can protect the code for security.
The W78E365 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.
2. FEATURES
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Fully static design 8-bit CMOS microcontroller
64K bytes of in-system programmable Flash EPROM for Application Program (APROM)
4K bytes of auxiliary ROM for Loader Program (LDROM)
256+1K bytes of on-chip RAM. (Including 1K bytes of AUX-RAM, software selectable)
Four 8-bit bi-directional ports; Port 0 has internal pull-up resisters enabled by software
One 4-bit multipurpose programmable port (I/O, interrupt, Chip select function)
Three 16-bit timer/counters
One full duplex serial port
Watchdog timer
5 channel PWM
Software Reset
P1.0 T2 programmable clock out
Eight-sources, two-level interrupt capability
Built-in power management
Code protection
Packaged in
− Lead Free (RoHS) DIP 40:
W78E365A40DL
− Lead Free (RoHS) PLCC 44: W78E365A40PL
− Lead Free (RoHS) PQFP 44: W78E365A40FL
− Lead Free (RoHS) LQFP 48: W78E365A40LL
Publication Release Date: January 10, 2007
Revision A9
- 3 -
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