AT94S datasheet(8/32 Pages) ATMEL

Part #	AT94S

Description	Secure 5K - 40K Gates of AT40K FPGA with 8-bit Microcontroller, up to 36 Kbytes of SRAM and On-chip Program Storage EEPROM

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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8 / 32 page

8

2314E–FPSLI–6/05

AT94S Secure Family

4.8

Programming Summary:

Write to Whole Device

SER_EN

≤ Low

PAGE_COUNT

≤ 0

START

Send Start Condition

BYTE_COUNT

≤ 0

Send Device Address

($A6)

ACK?

Send MSB of

EEPROM Address

(1)

ACK?

Send LSB of

EEPROM Address

(1)

Send Data Byte

(2)

BYTE_COUNT

≤

BYTE_COUNT+1

BYTE_COUNT =

T_BYTE?

Send Stop Condition

PAGE_COUNT

≤

PAGE_COUNT+1

PAGE_COUNT =

T_PAGE?

Yes

No

Yes

No

Send Start Condition

Send Device Address

($A7)

END

ACK?

Yes

No

ACK?

Yes

No

ACK?

Yes

No

Yes

SER_EN

≤ High

Low-power (Standby)

Power-Cycle EEPROM

(Latches 1st Byte for

FPGA Download

Operations)

1st Data Byte

Value Changed Due

to Write?

No

Yes

Middle Byte

EEPROM Address

ACK?

No

Yes

Notes:

1. The 1-Mbit part requires three EEPROM address

bytes; all three bytes must be individually ACK’d by

the EEPROM.

2. Data byte received/sent LSB to MSB.

4.8.1

EEPROM Address is Defined as:

Note:

where Xn ... X0 is (PAGE_COUNT)\b

4.8.2

T_BYTE

4.8.3

T_PAGE

AT17LV010

0000 000x9 x8x7x6x5 x4x3x2x1 x0000

0000

AT17LV010

128

AT17LV010

1024

cSDA

cSCK

cSDA

cSCK

DATA BIT

STOP CONDITION

cSDA

cSCK

ACK BIT

cSDA

cSCK

ACK

START CONDITION

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