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Sheet目录3873

177页 178页 179页 180页 [181页]182页 183页 184页 185页

dsPIC30F1010/202X

DS70178C-page 260

Preliminary

2006 Microchip Technology Inc.

TABLE 21-31: I2C BUS DATA TIMING REQUIREMENTS (MASTER MODE)

AC CHARACTERISTICS

Standard Operating Conditions: 3.3V and 5.0V (±10%)

(unless otherwise stated)

Operating temperature

-40°C

≤ TA ≤ +85°C for Industrial

-40°C

≤ TA ≤ +125°C for Extended

Param

No.

Symbol

Characteristic

Min(1)

Max

Units

Conditions

IM10

TLO:SCL

Clock Low Time 100 kHz mode

TCY / 2 (BRG + 1)

—

400 kHz mode

TCY / 2 (BRG + 1)

—

1 MHz mode(2)

TCY / 2 (BRG + 1)

—

IM11

THI:SCL

Clock High Time 100 kHz mode

TCY / 2 (BRG + 1)

—

400 kHz mode

TCY / 2 (BRG + 1)

—

1 MHz mode(2)

TCY / 2 (BRG + 1)

—

IM20

TF:SCL

SDA and SCL

Fall Time

100 kHz mode

—

300

CB is specified to be

from 10 to 400 pF

400 kHz mode

20 + 0.1 CB

300

1 MHz mode(2)

—

100

IM21

TR:SCL

SDA and SCL

Rise Time

100 kHz mode

—

1000

CB is specified to be

from 10 to 400 pF

400 kHz mode

20 + 0.1 CB

300

1 MHz mode(2)

—

300

IM25

TSU:DAT

Data Input

Setup Time

100 kHz mode

250

—

400 kHz mode

100

—

1 MHz mode(2)

TBD

—

IM26

THD:DAT Data Input

Hold Time

100 kHz mode

—

400 kHz mode

0.9

1 MHz mode(2)

TBD

—

IM30

TSU:STA

Start Condition

Setup Time

100 kHz mode

TCY / 2 (BRG + 1)

—

Only relevant for

repeated Start

condition

400 kHz mode

TCY / 2 (BRG + 1)

—

1 MHz mode(2)

TCY / 2 (BRG + 1)

—

IM31

THD:STA Start Condition

Hold Time

100 kHz mode

TCY / 2 (BRG + 1)

—

After this period the

first clock pulse is

generated

400 kHz mode

TCY / 2 (BRG + 1)

—

1 MHz mode(2)

TCY / 2 (BRG + 1)

—

IM33

TSU:STO Stop Condition

Setup Time

100 kHz mode

TCY / 2 (BRG + 1)

—

400 kHz mode

TCY / 2 (BRG + 1)

—

1 MHz mode(2)

TCY / 2 (BRG + 1)

—

IM34

THD:STO Stop Condition

100 kHz mode

TCY / 2 (BRG + 1)

—

Hold Time

400 kHz mode

TCY / 2 (BRG + 1)

—

1 MHz mode(2)

TCY / 2 (BRG + 1)

—

IM40

TAA:SCL

Output Valid

From Clock

100 kHz mode

—

3500

—

400 kHz mode

—

1000

—

1 MHz mode(2)

——

—

IM45

TBF:SDA Bus Free Time

100 kHz mode

4.7

—

Time the bus must be

free before a new

transmission can start

400 kHz mode

1.3

—

1 MHz mode(2)

TBD

—

Legend: TBD = To Be Determined

Note 1:

BRG is the value of the I2C Baud Rate Generator. Refer to the “Inter-Integrated Circuit (I2C)”

section in the “dsPIC30F Family Reference Manual” (DS70046).

Maximum pin capacitance = 10 pF for all I2C pins (for 1 MHz mode only).

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