AT88SC0104CA_11 ATMEL [ATMEL Corporation], AT88SC0104CA_11 Datasheet - Page 26
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AT88SC0104CA_11
Manufacturer Part Number
AT88SC0104CA_11
Description
Atmel CryptoMemory Specification Datasheet
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT88SC0104CA_11.pdf
(66 pages)
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8.
8.1
Synchronous Protocol
Communication with the CryptoMemory using the synchronous protocol is very similar to communication with AT24Cxxx Serial
EEPROM devices using a two-wire protocol (TWI). Basic command structure and timing are the same. However, a significant
difference exists when reading the CryptoMemory device that will be described below.
Start-up Sequence
When first powering up the device, five pulses are required on CLK-SCL for reading of internal registers. This may be
accomplished by sending one full command byte to the device. The device will not respond but will then be ready to respond
to the next correct command sequence.
Figure 8-1. Start-up Sequence
CLK-SCL
I/O-SDA
•
•
•
•
V cc
Power-up V
External pull-up resistor pulls I/O-SDA high with V
After stable V
CLK-SCL and I/O-SDA may be driven
CC
CC
, 5 pulses are applied to CLK-SCL
1
2
3
Atmel AT88SC0104CA/0204CA/0404CA/0808CA [Datasheet]
4
5
CC
8664E−CRYPTO−12/11
26
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