AT94K datasheet(6/192 Pages) ATMEL

Part #	AT94K

Description	5K - 40K Gates of AT40K FPGA with 8-bit Microcontroller, up to 36K Bytes of SRAM and On-chip JTAG ICE

PDF	192 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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6 / 192 page

AT94K Series FPSLIC

Rev. 1138F–FPSLI–06/02

The Busing

Network

Figure 3. Busing Network

Figure 4 depicts one of five identical FPGA busing planes. Each plane has three bus

resources: a local-bus resource (the middle bus) and two express-bus resources. Bus

resources are connected via repeaters. Each repeater has connections to two adjacent local-

bus segments and two express-bus segments. Each local-bus segment spans four cells and

connects to consecutive repeaters. Each express-bus segment spans eight cells and

bypasses a repeater. Repeaters regenerate signals and can connect any bus to any other bus

(all pathways are legal) on the same plane. Although not shown, a local bus can bypass a

repeater via a programmable pass gate, allowing long on-chip tri-state buses to be created.

Lo ca l /l oc al tu r ns ar e im pl e m e nte d th ro ug h p as s g a tes i n the c el l -b us i nt er fac e.

Express/express turns are implemented through separate pass gates distributed throughout

the array.

= I/O Pad

= AT40K Cell

= Repeater Row

= Repeater

= RAM Block

Interface to AVR

AT94K Datasheet(PDF) 6 Page - ATMEL Corporation