W78L32_06 Datasheet, PDF (5/18 Pages) Winbond – 8-BIT MICROCONTROLLER

W78L32/W78L032A/W78M032A
PSEN
Program Store Enable Output, active low. PSEN enables the external ROM onto the Port 0
address/data bus during fetch and MOVC operations. PSEN 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.
VSS, VDD
Power Supplies. These are the chip ground and positive supplies.
Publication Release Date: March 7, 2006
-5-
Revision A5