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AT94S Datasheet(PDF) 7 Page - ATMEL Corporation

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
PDF  31 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT94S Datasheet(HTML) 7 Page - ATMEL Corporation

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7
AT94S Secure Family
2314D–FPSLI–2/04
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.
EEPROM Address is Defined as:
Note:
where X
n ... X0 is (PAGE_COUNT)\b
T_BYTE
T_PAGE
AT17LV010
0000 000x
9 x8x7x6x5
x
4x3x2x1
x
0000
0000
AT17LV010
128
AT17LV010
1024
cSDA
cSCK
cSDA
cSCK
DATA BIT
STOP CONDITION
cSDA
cSCK
ACK BIT
cSDA
cSCK
ACK
START CONDITION
Programming Summary:
Write to Whole Device
SER_EN
≤ Low
PAGE_COUNT
≤ 0
START
Send Start Condition
BYTE_COUNT
≤ 0
Send Device Address
($A6)
ACK?
Send MSB of
EEPROM Address
(1)
ACK?
Send LSB of
EEPROM Address
(1)
Send Data Byte
(2)
BYTE_COUNT
≤
BYTE_COUNT+1
BYTE_COUNT =
T_BYTE?
Send Stop Condition
PAGE_COUNT
≤
PAGE_COUNT+1
PAGE_COUNT =
T_PAGE?
Yes
No
No
No
Yes
No
Send Start Condition
Send Device Address
($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



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