11.12 I
參數(shù)資料
型號: KMPC855TVR80D4
廠商: Freescale Semiconductor
文件頁數(shù): 61/78頁
文件大?。?/td> 0K
描述: IC MPU POWERQUICC 80MHZ 357-PBGA
標(biāo)準(zhǔn)包裝: 2
系列: MPC8xx
處理器類型: 32-位 MPC8xx PowerQUICC
速度: 80MHz
電壓: 3.3V
安裝類型: 表面貼裝
封裝/外殼: 357-BBGA
供應(yīng)商設(shè)備封裝: 357-PBGA(25x25)
包裝: 托盤
MPC860 PowerQUICC Family Hardware Specifications, Rev. 9
64
Freescale Semiconductor
CPM Electrical Characteristics
11.12 I2C AC Electrical Specifications
Table 26 provides the I2C (SCL < 100 kHz) timings.
Table 27 provides the I2C (SCL > 100 kHz) timings.
Table 26. I2C Timing (SCL < 100 kHZ)
Num
Characteristic
All Frequencies
Unit
Min
Max
200
SCL clock frequency (slave)
0
100
kHz
200
SCL clock frequency (master)1
1 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.
1.5
100
kHz
202
Bus free time between transmissions
4.7
μs
203
Low period of SCL
4.7
μs
204
High period of SCL
4.0
μs
205
Start condition setup time
4.7
μs
206
Start condition hold time
4.0
μs
207
Data hold time
0
μs
208
Data setup time
250
ns
209
SDL/SCL rise time
1
μs
210
SDL/SCL fall time
300
ns
211
Stop condition setup time
4.7
μs
Table 27. . I2C Timing (SCL > 100 kHZ)
Num
Characteristic
Expression
All Frequencies
Unit
Min
Max
200
SCL clock frequency (slave)
fSCL
0
BRGCLK/48
Hz
200
SCL clock frequency (master)1
1 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.
fSCL
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
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