AT88SC153-09GT-00 ATMEL Corporation, AT88SC153-09GT-00 Datasheet - Page 3

• Manufacturer Part Number: AT88SC153-09GT-00
• Description: 3 x 64 x 8 Secure Memory with Authentication
• Manufacturer: ATMEL Corporation

Pin Descriptions
Supply Voltage (VCC)
Serial Clock (SCL)
Serial Data (SDA)
Reset (RST)
1016D–SMEM–04/04
Figure 3. Block Diagram
The VCC input is a 2.7V-to-5.5V positive voltage supplied by the host.
The SCL input is used to positive edge clock data into the device and negative edge
clock data out of the device.
The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and
may be wire-ORed with any number of other open-drain or open-collector devices. An
external pull-up resistor should be connected between SDA and VCC. The value of this
resistor and the system capacitance loading the SDA bus will determine the rise time of
SDA. This rise time will determine the maximum frequency during read operations. Low
value pull-up resistors will allow higher frequency operations while drawing higher aver-
age power supply current.
When the RST input is pulsed high, the device will output the data programmed into the
32-bit answer-to-reset register. All password and authentication access will be reset.
Following a reset, device authentication and password verification sequences must be
presented to re-establish user access.
VCC
GND
RST
SCL
SDA
Interface
Power
ISO
Mgt.
Authentication
Verification
Password
To Reset
Transfer
Answer
Data
Unit
AT88SC153
Generator
EEPROM
Random
3