N55Pxxx Data Sheet

Release Date: Mar. 2017

- 5 -

Version A2.1

3. Pad Description

Pad Name

Type

Power

Supply

Description

BPA0 ~ BPA7

IO

VDDIOA

General-purpose IO, BPA port.

BPB0 ~ BPB7

IO

VDDIOB

General-purpose IO, BPB port.

BPC0 ~ BPC7

IO

VDDIOC

General-purpose IO, BPC port.

RJPA

I

VDDIOA

RJPA is connected to an external resistor to set the constant current of

BPA port. It can be NC if constant current is not enabled.

RJPB

I

VDDIOB

RJPB is connected to an external resistor to set the constant current of

BPB port. It can be NC if constant current is not enabled.

RJPC

I

VDDIOC

RJPC is connected to an external resistor to set the constant current of

BPC port. It can be NC if constant current is not enabled.

CSB

I

VDDSPI

SPI chip select (low active)

SCK

I

VDDSPI

SPI clock

MOSI

I

VDDSPI

SPI data input

MISO

O

VDDSPI

SPI data output (clock output if TEST bit is “1”)

DEVICE

I

VDDSPI

Device ID (floating)

WAKEUP

O

VDDSPI

Host wakeup

VDD

P

Positive power supply for core logic

VDDSPI

P

Positive power supply for SPI pads

VSS

P

Negative power supply for core logic and SPI pads

VDDIOA

P

Positive power supply for BPA port

VSSIOA

P

Negative power supply for BPA port

VDDIOB

P

Positive power supply for BPB port

VSSIOB

P

Negative power supply for BPB port

VDDIOC

P

Positive power supply for BPC port

VSSIOC

P

Negative power supply for BPC port