ATXMEGA32D4-CU 查看數據表（PDF） - Atmel Corporation

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ATXMEGA32D4-CU

8/16-bit Atmel XMEGA D4 Microcontroller

Atmel Corporation 

XMEGA D4

32.15 Two-Wire Interface Characteristics

Table 32-29 describes the requirements for devices connected to the Two-Wire Interface Bus.

The Atmel AVR XMEGA Two-wire interface meets or exceeds these requirements under the

noted conditions. Timing symbols refer to Figure 32-7.

Figure 32-7. Two-Wire Interface bus timing.

tof

tHIGH

tLOW

tr

SCL

tSU;STA

SDA

tHD;STA

tHD;DAT

tSU;DAT

tSU;STO

tBUF

Table 32-29. Two-wire interface characteristics.

Symbol Parameter

VIH

Input high voltage

VIL

Input low voltage

Vhys

Hysteresis of schmitt trigger inputs

VOL

Output low voltage

tr

Rise time for both SDA and SCL

tof

Output fall time from VIHmin to VILmax

tSP

Spikes suppressed by input filter

II

Input current for each I/O pin

CI

Capacitance for each I/O pin

fSCL

SCL clock frequency

RP

Value of pull-up resistor

Condition

3mA, sink current

10pF < Cb < 400pF (2)

0.1VCC < VI < 0.9VCC

fPER (3)>max(10fSCL, 250kHz)

fSCL ≤ 100kHz

fSCL > 100kHz

Min.

0.7VCC

0.5

0.05VCC (1)

0

20+0.1Cb (1)(2)

20+0.1Cb (1)(2)

0

-10

0

V----C----C----–-----0---.--4----V--

3mA

Typ.

Max.

VCC+0.5

0.3×VCC

Units

V

0.4

300

250

ns

50

10

µA

10

pF

400

kHz

1----0---0----n---s-

Cb

Ω

3----0---0----n---s-

Cb

83

8135L–AVR–06/12

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