XPC850ZT50BU Datasheet, PDF (65/76 Pages) Motorola, Inc – Communications Controller Hardware Specifications

I2C AC Electrical Specifications
Table 8-24. I²C Timing (SCL < 100 KHZ) (CONTINUED)
Num
Characteristic
All Frequencies
Unit
Min
Max
208 Data setup time
250.00
—
ns
209 SDL/SCL rise time
—
1.00
µs
210 SDL/SCL fall time
—
300.00 ns
211 Stop condition setup time
4.70
—
µs
1 _{SCL frequency is given by SCL = BRGCLK_frequency / ((BRG register + 3) * pre_scaler * 2).}
The ratio SyncClk/(BRGCLK/pre_scaler) must be greater or equal to 4/1.
Table 8-25 provides the I²C (SCL > 100 KHz) timings.
Table 8-25. I²C Timing (SCL > 100 KHZ)
Num
Characteristic
All Frequencies
Expression
Unit
Min
Max
200 SCL clock frequency (slave)
200 SCL clock frequency (master) ¹
fSCL
fSCL
0
BRGCLK/48
Hz
BRGCLK/16512
BRGCLK/48
Hz
202 Bus free time between transmissions
1/(2.2 * fSCL)
—
s
203 Low period of SCL
1/(2.2 * fSCL)
—
s
204 High period of SCL
1/(2.2 * fSCL)
—
s
205 Start condition setup time
1/(2.2 * fSCL)
—
s
206 Start condition hold time
1/(2.2 * fSCL)
—
s
207 Data hold time
0
—
s
208 Data setup time
1/(40 * fSCL)
—
s
209 SDL/SCL rise time
—
1/(10 * fSCL)
s
210 SDL/SCL fall time
—
1/(33 * fSCL)
s
211 Stop condition setup time
1/2(2.2 * fSCL)
—
s
1 _{SCL frequency is given by SCL = BrgClk_frequency / ((BRG register + 3) * pre_scaler * 2).}
The ratio SyncClk/(Brg_Clk/pre_scaler) must be greater or equal to 4/1.
MOTOROLA
MPC850 (Rev. A/B/C) Hardware Specifications
65