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FPC202

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SNLS565 – DECEMBER 2017

Product Folder Links: FPC202

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5 Description Continued

The FPC202 is designed to allow placement on the bottom side of the PCB, underneath the press fit connector,

to simplify routing. This localized control of the ports’ low-speed signals cuts system bill of materials (BOM) cost

by enabling the use of smaller I/O count control devices (FPGAs, CPLDs, MCUs) and by reducing routing layer

congestion.

The FPC202 is compatible with standard SFF-8431, SFF-8436, and SFF-8449 low-speed management

interfaces, including a dedicated 100/400-kHz I2C interface to each port. Additional general-purpose pins are

available to perform functions such as driving port status LEDs or controlling power switches. The LED drivers

have convenience features such as programmable blinking and dimming. The interface to the host controller can

operate on a separate supply voltage between 1.8 V and 3.3 V to support low-voltage I/Os.

For each port, the FPC202 has a total of four LED drivers, 12 general-purpose I/Os, and two downstream I2C

busses. This expanded set of I/Os allows for control of additional components and features within a system. The

general-purpose outputs can be used to drive additional LEDs if more than four are required per port.

The FPC202 can pre-fetch data from user-specified registers in each module, making the data readily accessible

to the host through a fast I2C (up to 1 MHz) or SPI (up to 10 MHz) interface. In addition, the FPC202 can trigger

an interrupt to the host whenever critical, user-configurable events occur associated with any of the ports under

its control. This eliminates the need to continuously poll the modules.

6 Device Comparison Table

PART NUMBER

PORTS

LED DRIVERS PER PORT

GPIOs PER PORT

ACCESSIBLE DOWNSTREAM

ADDRESSES

FPC202

2

4

12

All valid I2C addresses

FPC402

4

2

6

All valid I2C addresses

FPC401

4

2

6

MSA addresses: 0xA0, 0xA2