GENERAL DESCRIPTION

The W78C58 is a derivative of the W78C52 microcontroller family that provides extended internal ROM. The chip has 32K bytes of mask ROM and 256 bytes of RAM.

FEATURES

• DC to 40 MHz extensive operating frequency

• 256-byte on-chip scratch pad RAM

• 32K-byte on-chip mask ROM

• 64K-byte address space for external Program Memory

• 64K-byte address space for external Data Memory

• Three 16-bit timer/counters

• Four 8-bit bit-addressable I/O ports

• One extra 4-bit bit-addressable I/O port, additonal INT2 / INT3

(Available on 44-pin PLCC/QFP package)

• Eight-source, two priority-level interrupts

• Low EMI emission mode

• Built-in programmable power-saving modes - Idle mode & Power-down mode

• Packages:

- DIP 40: W78C58-16/24/40

- PLCC 44: W78C58P-16/24/40

- QFP 44: W78C58F-16/24/40

- TQFP 44: W78C58M-16/24/40