Fusion Device Family Overview

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Prel i minary v0 .4

to calculate current. The AG MOSFET gate driver pad turns the external MOSFET on and off. The AT

pad measures the load-side voltage level.

Embedded Memories

Flash Memory Blocks

The flash memory available in each Fusion device is composed of one to four flash blocks, each 2

Mbits in density. Each block operates independently with a dedicated flash controller and

interface. Fusion flash memory blocks combine fast access times (60 ns random access and 10 ns

access in Read-Ahead mode) with a configurable 8-, 16-, or 32-bit datapath, enabling high-speed

flash operation without wait states. The memory block is organized in pages and sectors. Each

page has 128 bytes, with 33 pages comprising one sector and 64 sectors per block. The flash block

can support multiple partitions. The only constraint on size is that partition boundaries must

coincide with page boundaries. The flexibility and granularity enable many use models and allow

added granularity in programming updates.

Fusion devices support two methods of external access to the flash memory blocks. The first

method is a serial interface that features a built-in JTAG-compliant port, which allows in-system

programmability during user or monitor/test modes. This serial interface supports programming of

an AES-encrypted stream. Secure data can be passed through the JTAG interface, decrypted, and

then programmed in the flash block. The second method is a soft parallel interface.

FPGA logic or an on-chip soft microprocessor can access flash memory through the parallel

interface. Since the flash parallel interface is implemented in the FPGA fabric, it can potentially be

customized to meet special user requirements. For more information, refer to the CoreCFI

Figure 1-1 • Analog Quad

Analog Quad

AV

AC

AT

Voltage

Monitor Block

Current

Monitor Block

AG

Power

Line Side

Load Side

Pre-

scaler

Digital

Input

Power

MOSFET

Gate Driver

Current

Monitor/Instr

Amplifier

Temperature

Monitor

Digital

Input

Digital

Input

Pre-

scaler

Pre-

scaler

Pads

To Analog MUX

To Analog MUX

To Analog MUX

To FPGA

(DAVOUTx)

To FPGA

(DACOUTx)

To FPGA

(DATOUTx)

On-Chip

Gate

Driver

Temperature

Monitor Block

Off-Chip

From FPGA

(GDONx)