Rainbow-electronics MAXQ2010 Manual do Utilizador descarregar pdf (Página 10)

MAXQ2010

16-Bit Mixed-Signal Microcontroller with LCD

10 ______________________________________________________________________________________

C ELECTRICAL CHARACTERISTICS

DVDD

= V

AVDD

= 2.7V to 3.6V, T

= -40°C to +85°C.)

Note 19: Devices that use nonstandard supply voltages that do not conform to the intended I

C bus system levels must relate their

input levels to the voltage to which the pullup resistors R

are connected. See Figure 3.

Note 20: C

—Capacitance of one bus line in pF.

Note 21: The maximum fall time of 300ns for the SDA and SCL bus lines shown in the

C Bus Controller Timing

table is longer than

the specified maximum t

OF_I2C

of 250ns for the output stages. This allows series protection resistors (R

) to be connected

between the SDA/SCL pins and the SDA/SCL bus lines as shown in the

C Bus Controller Timing (Acting as I

C Slave)

table without exceeding the maximum specified fall time. See Figure 3.

SDA

P6.7

SCL

P6.6

DEVICE

DVDD

MAXQ2010

Figure 3. Series Resistors (R

) for Protecting Against High-Voltage Spikes

STANDARD MODE FAST MODE

PARAMETER SYMBOL TEST CONDITIONS

MIN MAX MIN MAX

UNITS

Input Low Voltage (Note 19) V

IL_I2C

-0.5 0.3 x V

DVDD

-0.5 0.3 x V

DVDD

Input High Voltage (Note 19) V

IH_I2C

0.7 x V

DVDD

0.7 x V

DVDD

+ 0.5V V

Input Hysteresis (Schmitt) V

IHYS_I2C

DVDD

> 2V 0.05 x V

DVDD

Output Logic-Low (Open

Drain or Open Collector)

OL_I2C

DVDD

> 2V, 3mA sink

current

0 0.4 0 0.4 V

Output Fall Time from

IH_MIN

to V

IL_MAX

with Bus

Capacitance from 10pF to

400pF (Notes 20, 21)

OF_I2C

250 20 + 0.1C

250 ns

Pulse Width of Spike

Filtering That Must Be

Suppressed by Input Filter

SP_I2C

0 50 ns

Input Current on I/O I

IN_I2C

Input voltage from 0.1 x

DVDD

to 0.9 x V

DVDD

-10 +10 -10 +10 μA

I/O Capacitance C

IO_I2C

10 10 pF

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 32 33

MAXQ2010 1

Comentários a estes Manuais

Sem comentários

Rainbow-electronics MAXQ2010 Manual do Utilizador Página 10

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics MAXQ2010