ATAES132-SH-ER Atmel, ATAES132-SH-ER Datasheet - Page 140

• Manufacturer Part Number: ATAES132-SH-ER
• Description: EEPROM AES 32Kbit EE I2C
• Manufacturer: Atmel

Specifications of ATAES132-SH-ER

• Rohs: yes
• Maximum Clock Frequency: 1 MHz
• Operating Supply Voltage: 6 V
• Maximum Operating Temperature: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Interface Type: I2C
• Factory Pack Quantity: 2300

L.2.4.
L.2.5.
Entering the Sleep State
If the ATAES132 is in the active state, the host can send a sleep command to place the ATAES132 in the sleep state. (See
Section 7.24) It is not possible to transition the device directly from the standby state to the sleep state. The host must
wakeup the device and then must send a sleep command to place the device in sleep.
The device can also be configured to enter the sleep state at power up as described in Section L.2.1.
The ATAES132 exits sleep mode only if a wakeup event occurs on the IO pins. Wakeup is discussed in Sections L.2.5 and
L.2.6. The ChipState register changes to 0x5555 when the ATAES132 leaves the sleep state. (see Section L.3)
SPI WakeUp
To wakeup the ATAES132 configured for SPI interface mode, the host is required to read the status register using the SPI
read status register command. The ATAES132 will answer the SPI read status register command with the device "status" if the
host has not violated the 100nS minimum t
"busy" (status = 0xFF) during wakeup. When wakeup is complete, the ATAES132 "status" changes to indicate the device is in
the active state.
The ATAES132 will only accept the SPI read status register command while it is "busy". All other commands will be ignored.
The SPI read status register command is described in Section K.3.6.
Figure L-17. SPI interface timing,
The wakeup process begins when a device in the standby or sleep state experiences a high-to-low transition of the
The device is ready to receive a read status register command from the host after wakeup time t
state, or t
state, or t
when the device enters the active state. The wakeup timing specifications are in Table 9-5.
WupSL.STATUS
WupSL.RDY
for the sleep state – t
for the sleep state. The wakeup is complete after the wakeup ready time of t
setup time at wakeup
WupSB.RDY
CSS.Wup
/ t
setup time requirement. The ATAES132 "status" will indicate the device is
WupSL.RDY
begin when the
Atmel ATAES132 Preliminary Datasheet
pin high-to-low transition occurs and end
WupSB.STATUS
WupSB.RDY
8760A−CRYPTO−5/11
for the standby
for the standby
pin.
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