mpc855t Freescale Semiconductor, Inc, mpc855t Datasheet - Page 64

• Manufacturer Part Number: mpc855t
• Description: Mpc855t Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

CPM Electrical Characteristics
11.12 I
Table 26
1
Table 27
1
64
Num
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/(BRGCLK/pre_scaler) must be greater than or equal to 4/1.
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/(BRGCLK / pre_scaler) must be greater than 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
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
provides the I
provides the I
2
C AC Electrical Specifications
2
2
Characteristic
C (SCL < 100 kHz) timings.
C (SCL > 100 kHz) timings.
MPC860 PowerQUICC™ Family Hardware Specifications, Rev. 8
1
1
Table 27. . I
Characteristic
Table 26. I
2
2
C Timing (SCL < 100 kH
C Timing (SCL > 100 kH
Expression
fSCL
fSCL
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
Z
)
)
Min
—
—
0
0
All Frequencies
Min
250
1.5
4.7
4.7
4.0
4.7
4.0
4.7
All Frequencies
—
—
0
0
1/(10 * fSCL)
1/(33 * fSCL)
Freescale Semiconductor
BRGCLK/48
BRGCLK/48
Max
—
—
—
—
—
—
—
—
Max
100
100
300
—
—
—
—
—
—
—
—
1
Unit
Unit
kHz
kHz
Hz
Hz
μs
μs
μs
μs
μs
μs
ns
μs
ns
μs
s
s
s
s
s
s
s
s
s
s