DSP56004ROM datasheet(54/82 Pages) FREESCALE

54 / 82 page

2-30

DSP56004/D, Rev. 3

MOTOROLA

Specifications

Serial Host Interface (SHI) I2C Protocol Timing

SERIAL HOST INTERFACE (SHI) I2C PROTOCOL TIMING

(VIHS = 0.7 × VCC, VILS = 0.3 × VCC)

(VOHS = 0.8 × VCC, VOLS = 0.2 × VCC)

(RP (min) = 1.5 kΩ)

Table 2-13

SHI I2C Protocol Timing

Standard I2C

(CL = 400 pF, RP = 2 kΩ, 100 kHz)

No.

Characteristics

Symbol

All frequencies

Unit

Min

Max

—

Tolerable Spike Width on SCL or SDA

Filters Bypassed

Narrow Filters Enabled

Wide Filters Enabled

—

100

171

Minimum SCL Serial Clock Cycle

tSCL

10.0

—

µs

172

Bus Free Time

tBUF

4.7

—

µs

173

Start Condition Set-up Time

tSU;STA

4.7

—

µs

174

Start Condition Hold Time

tHD;STA

4.0

—

µs

175

SCL Low Period

tLOW

4.7

—

µs

176

SCL High Period

tHIGH

4.0

—

µs

177

SCL and SDA Rise Time

—

1.0

µs

178

SCL and SDA Fall Time

—

0.3

µs

179

Data Set-up Time

tSU;DAT

250

—

180

Data Hold Time

tHD;DAT

0.0

—

182

SCL Low to Data Out Valid

tVD;DAT

—

3.4

µs

183

Stop Condition Set-up Time

tSU;STO

4.0

—

µs

Note:

Refer to the DSP56004 User’s Manual for a detailed description of how to use the different filtering

modes.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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