MPC8378E datasheet(62/127 Pages) FREESCALE

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MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

I2C

13 I2C

This section describes the DC and AC electrical characteristics for the I2C interface of the MPC8378E.

13.1

I2C DC Electrical Characteristics

Table 51 provides the DC electrical characteristics for the I2C interface of the MPC8378E.

13.2

I2C AC Electrical Specifications

Table 52 provides the AC timing parameters for the I2C interface of the device.

Table 51. I2C DC Electrical Characteristics

At recommended operating conditions with OVDD of 3.3 V ± 165 mV.

Parameter

Symbol

Min

Max

Unit

Notes

Input high voltage level

VIH

0.7

× OV

OVDD + 0.3

—

Input low voltage level

VIL

–0.3

0.3

× OV

V—

Low level output voltage

VOL

00.2

× OV

Output fall time from VIH(min) to VIL(max) with a bus capacitance

from 10 to 400 pF

tI2KLKV

20 + 0.1

× C

250

Pulse width of spikes which must be suppressed by the input filter

tI2KHKL

050

Capacitance for each I/O pin

—10

—

Input current

(0 V

≤ V

IN ≤ OVDD)

IIN

—± 30

μA4

Note:

1 Output voltage (open drain or open collector) condition = 3 mA sink current.

2 C

B = capacitance of one bus line in pF.

3 Refer to the MPC8379E PowerQUICC II Pro Integrated Host Processor Reference Manual for information on the digital filter

used.

4 I/O pins will obstruct the SDA and SCL lines if OV

DD is switched off.

Table 52. I2C AC Electrical Specifications

All values refer to VIH (min) and VIL (max) levels (see Table 51).

Parameter

Symbol1

Min

Max

Unit

Notes

SCL clock frequency

fI2C

0400

kHz

—

Low period of the SCL clock

tI2CL

1.3

—

μs—

High period of the SCL clock

tI2CH

0.6

—

μs—

Setup time for a repeated START condition

tI2SVKH

0.6

—

μs—

Hold time (repeated) START condition (after this period, the first

clock pulse is generated)

tI2SXKL

0.6

—

μs—

Data setup time

tI2DVKH

100

—

MPC8378E Datasheet(PDF) 62 Page - Freescale Semiconductor, Inc

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