MPC870 FREESCALE [Freescale Semiconductor, Inc], MPC870 Datasheet - Page 66

• Manufacturer Part Number: MPC870
• Description: Hardware Specifications
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

CPM Electrical Characteristics
Table 29
66
1
1
SCL frequency is given by SCL = BRGCLK_frequency / ((BRG register + 3) × pre_scalar × 2).
SCL frequency is given by SCL = BrgClk_frequency / ((BRG register + 3) × pre_scalar × 2).
Num
Num
210
211
200
200
202
203
204
205
206
207
208
209
210
211
The ratio SyncClk/(BRGCLK/pre_scalar) must be greater than or equal to 4/1.
The ratio SyncClk/(Brg_Clk/pre_scalar) must be greater than or equal to 4/1.
provides the I
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
2
C (SCL > 100 KHz) timings.
Characteristic
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Table 28. I
MPC875/MPC870 Hardware Specifications, Rev. 3.0
Table 29. I
1
2
C Timing (SCL < 100 KH
Characteristic
2
C Timing (SCL > 100 KH
Expression
fSCL
fSCL
—
—
—
—
—
—
—
—
—
—
Z
) (continued)
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
All Frequencies
1/(10 × fSCL)
1/(33 × fSCL)
Frequencies
Min
4.7
BRGCLK/48
BRGCLK/48
—
Freescale Semiconductor
Max
All
—
—
—
—
—
—
—
—
Max
300
—
Unit
Unit
Hz
Hz
ns
µs
s
s
s
s
s
s
s
s
s
s