Input/output Pads

I/O pads may include ESD protection and other circuitry. See Analog-VLSI Open-IP Chapter 2 for circuit diagrams and further details (in Japanese).

VSS/VDD are intended for the analog core of the chip. VSS is normally also the substrate connection.

VSS0/VDD0 are intended for digital peripheral circuitry.

VSS1/VDD1 are intended for the digital core of the chip.

VSSE/VDDE are intended for analog peripheral circuitry.

PATH is an ESD-protected.pad intended for low impedance analog I/O.

PATHR is an ESD-protected.pad with a series resistor intended for high impedance analog input.

PDIN is an ESD-protected.pad with a CMOS input buffer.

PDOUT is an ESD-protected.pad with a CMOS output buffer.

PDTH is an ESD-protected.pad intended for specialized digital ouputs such as LVDS .

PDTHR is an ESD-protected.pad with a series resistor intended for specialized digital inputs such as LVDS .

TROUT is an ESD-protected.pad with a tri-state CMOS output buffer.

PAD is a pad without any additional circuitry.