Z8927320VSC Datasheet, PDF (37/60 Pages) Zilog, Inc. – 16-BIT DIGITAL SIGNAL PROCESSORS WITH A/D CONVERTER

ZiLOG
Port3Ñ8-BIt Programmable I/O
Port3 is an additional I/O port available only in the 80-pin
package. P3.3–P3.0 are inputs and P3.7–P3.4 are outputs.
Bit 8 of Bank15/EXT2 enables and disables Port3. The LSB
of Bank2/EXT5 is the Port3 Data Register.
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
DS000202-DSP0599
37