w78c032c Winbond Electronics Corp America, w78c032c Datasheet - Page 5

• Manufacturer Part Number: w78c032c
• Description: 8-bit Mcu Series 80c51-based
• Manufacturer: Winbond Electronics Corp America

W78C32C/W78C032C
PSEN
PSEN
Program Store Enable Output, active low.
enables the external ROM onto the Port 0
PSEN
address/data bus during fetch and MOVC operations.
goes to a high state during reset with a
weak pull-up.
XTAL1
Crystal 1. This is the crystal oscillator input. This pin may be driven by an external clock.
XTAL2
Crystal 2. This is the crystal oscillator output. It is the inversion of XTAL1.
V
, V
SS
CC
Power Supplies. These are the chip ground and positive supplies.
Publication Release Date: December 4, 2006
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Revision A6