Owner's manual

CryptoCompanion™ Chip
5
5277CS–CryptoCompanion–2/09
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.
2. AC & DC Characteristics (Preliminary)
Table 2. DC Characteristics
(1)
Applicable over recommended operating range from V
CC
= +2.7 to 3.6 V,
T
AC
= -40
o
C to 85
o
C (unless otherwise noted)
Symbol Parameter Test Condition Min Typ Max Units
V
CC
Supply Voltage 2.7 3.6 V
I
CC
Supply Current 400kHz 5 mA
I
SB
Standby Current V
IN
= V
CC
or GND 10 μA
V
IL
SDA Input Low Voltage 0 V
CC
x 0.2 V
V
IL
CLK Input Low Voltage 0 V
CC
x 0.2 V
V
IL
RST Input Low Voltage 0 V
CC
x 0.2 V
V
IL
PDN Input Low Voltage 0 V
CC
x 0.2 V
V
IH
SDA Input High Voltage V
CC
x 0.7 5.5 V
V
IH
SCL Input High Voltage V
CC
x 0.7 5.5 V
V
IH
RST Input High Voltage V
CC
x 0.7 5.5 V
V
IH
PDN Input High Voltage V
CC
x 0.7 5.5 V
I
IL
SDA Input Low Current 0 < V
IL
< V
CC
x 0.15 15 μA
I
IL
SCL Input Low Current 0 < V
IL
< V
CC
x 0.15 15 μA
I
IL
RST Input Low Current 0 < V
IL
< V
CC
x 0.15 15 μA
I
IL
PDN Input Low Current 0 < V
IL
< V
CC
x 0.15 15 μA
I
IH
SDA Input High Current V
CC
x 0.7 < V
IH
< V
CC
20
μA
I
IH
SCL Input High Current V
CC
x 0.7 < V
IH
< V
CC
20
μA
I
IH
RST Input High Current V
CC
x 0.7 < V
IH
< V
CC
20
μA
I
IH
PDN Input High Current V
CC
x 0.7 < V
IH
< V
CC
20
μA
V
OL
SDA Output Low Voltage I
OL
= 1mA 0 V
CC
x 0.15 V
Note: 1. Typical values at 25° C. Maximum values are characterized values and not test limits in production.