TA100 datasheet(14/28 Pages) MICROCHIP

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Parameters

Symbol

Fast-Mode Plus

Units

Min.

Max.

Input Fall Time(1, 3)

20 x (VDD/5.5V)(5)

120

Clock Low to Data Out Valid

tAA

—

450

Time bus must be free before a new transmission can start (1)

tBUF

500

—

Pulse width of spikes that must be suppressed by the input filter(4)

tSP

—

Notes:

Values are based on characterization and are not tested.

AC measurement conditions: input pulse voltages: 0.3 x VCC to 0.7 x VCC, input rise and fall times: ≤ 50 ns.

System designers must ensure that all AC parametrics are met. Rise fall times shown are for the Fast Mode

Plus (1 MHz) of operation. For slower clock speeds, the rise and fall times may be increased but must still

meet the industry standard I2C specification UM10204.

Input filters on the SDA and SCL pins will suppress noise spikes of less than 50 ns.

Backwards compatibility is necessary for the Fast mode (400 kHz) specifications.

Figure 6-1. I2C Synchronous Data Timing

SCL

SDA IN

SDA OUT

HIGH

LOW

BUF

SU.STO

SU.DAT

HD.DAT

HD.STA

SU.STA

6.3.3

SPI Interface Timing

Table 6-6. AC Characteristics of SPI Interface

Applicable over the recommended operating range from TA = -40°C to +125°C, VCC = +2.7V to +5.5V.

Parameters

Symbol

Min.

Max.

Units

SCK Clock Frequency

fSCK

—

MHz

SCK High Time

tWH

—

SCK Low Time

tWL

—

CS High Time

tCS

100

—

CS Setup Time

tCSS

100

—

CS Hold Time

tCSH

100

—

Data in Setup Time

tSU

—

Data in Hold Time

—

Input Rise Time(1, 2)

tRI

—

μs

TA100 (B5)

Electrical Characteristics

and its subsidiaries

Summary Datasheet

DS20006369C-page 14

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