mpc850de Freescale Semiconductor, Inc, mpc850de Datasheet - Page 60

• Manufacturer Part Number: mpc850de
• Description: Mpc850 Rev. A/b/c Communications Controller
• Manufacturer: Freescale Semiconductor, Inc

I2C AC Electrical Specifications
Table 25 provides the I
60
1
Num
200
200
202
203
204
205
206
207
208
209
210
211
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.
SCL clock frequency (slave)
SCL clock frequency (master)
Bus free time between transmissions
Low period of SCL
High period of SCL
Start condition setup time
Start condition hold time
Data hold time
Data setup time
SDL/SCL rise time
SDL/SCL fall time
Stop condition setup time
1
Num
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.
208
209
210
211
Data setup time
SDL/SCL rise time
SDL/SCL fall time
Stop condition setup time
Characteristic
2
C (SCL > 100 KHz) timings.
Table 24. I
MPC850 (Rev. A/B/C) Hardware Specifications
Table 25. I
1
Characteristic
2
C Timing (SCL < 100 KH
2
C Timing (SCL > 100 KH
fSCL
fSCL
Expression
BRGCLK/16512
1/2(2.2 * fSCL)
1/(2.2 * fSCL)
1/(2.2 * fSCL)
1/(2.2 * fSCL)
1/(2.2 * fSCL)
1/(2.2 * fSCL)
1/(40 * fSCL)
Z
) (
Min
—
—
0
0
CONTINUED
All Frequencies
250.00
All Frequencies
Z
4.70
Min
)
—
—
)
300.00
1/(10 * fSCL)
1/(33 * fSCL)
BRGCLK/48
BRGCLK/48
Max
1.00
—
—
Max
—
—
—
—
—
—
—
—
Unit
ns
ns
s
s
MOTOROLA
Unit
Hz
Hz
s
s
s
s
s
s
s
s
s
s