at88sc016 ATMEL Corporation, at88sc016 Datasheet - Page 4

• Manufacturer Part Number: at88sc016
• Description: Cryptocompanion Chip At88sc016 Summary
• Manufacturer: ATMEL Corporation

2. AC & DC Characteristics (Preliminary)
4
Applicable over recommended operating range from V
T
Symbol
V
Icc
I
V
V
V
V
V
V
I
I
I
I
I
I
V
V
I
SB
IL
IL
IL
IH
IH
IH
OH
AC
CC
IL
IL
IL
IH
IH
IH
OH
OL
1.3.3. Environmental
CryptoCompanion is guaranteed to operate over the commercial temperature range of 0° to 70° C. ESD is rated at 3KV,
Human Body Model.
1.3.4. TWI Input/Output Operation
CryptoCompanion communicates to the system using a two wire interface (TWI), which is similar to SMBus. The chip
operates as a slave and does not support clock stretching. This two wire protocol is identical to that supported by the
Atmel AT24C16A serial EEPROM chips. Please see that datasheet on the Atmel web site for detailed timing and
protocol information.
The system processor is expected to properly format commands for CryptoCompanion (which may include information
from the CRF chip), and then process the outputs of CryptoCompanion (which may include sending some of the
outputs to the CRF chip).
CryptoCompanion cannot directly communicate with CRF chips. Both CRF and CryptoCompanion are slave devices.
The bus master may use one or two busses to communicate with them. Separate TWI addresses must be used if both
chips are on the same bus.
All communications packets sent to or from CryptoCompanion use the following naming conventions. The column
labeled “TWI name” provides the name of the byte as described in the AT24C16A datasheet.
CryptoCompanion™ Chip
= 0
Table 2. DC Characteristics
o
C to 70
Supply Current
Supply Voltage
Standby Current
SDA Input Low Voltage
CLK Input Low Voltage
RST Input Low Voltage
SDA Input High Voltage
SCL Input High Voltage
RST Input High Voltage
SDA Input Low Current
SCL Input Low Current
RST Input Low Current
SDA Input High Current
SCL Input High Current
RST Input High Current
SDA Output High Voltage
SDA Output Low Voltage
SDA Output High Current
o
C (unless otherwise noted)
Parameter
V
0 < V
0 < V
0 < V
V
V
V
20K ohm external pull-up
I
1MHz
VOH
OL
IN
CC
CC
CC
= 1mA
= VCC or GND
x 0.7 < V
x 0.7 < V
x 0.7 < V
IL
IL
IL
Test Condition
< V
< V
< V
CC
CC
CC
x 0.15
x 0.15
x 0.15
IH
IH
IH
CC
< V
< V
< V
= +2.7 to 3.3V,
CC
CC
CC
V
V
V
V
CC
CC
CC
CC
Min
2.7
0
0
0
0
x 0.7
x 0.7
x 0.7
x 0.7
Typ
V
V
V
V
CC
CC
CC
CC
Max
100
150
100
V
V
V
V
3.3
15
15
50
20
20
x 0.15
5
x 0.2
x 0.2
x 0.2
CC
CC
CC
CC
5277AS− CryptoCompanion −02/08
Units
mA
uA
uA
uA
uA
uA
uA
uA
uA
V
V
V
V
V
V
V
V
V