參數(shù)資料
型號(hào)： MCF52252AF80
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP100
封裝： 14 X 14 MM, ROHS COMPLIANT, LQFP-100
文件頁數(shù)： 31/46頁
文件大?。?/td> 560K
代理商： MCF52252AF80
MCF52259 ColdFire Microcontroller, Rev. 4
Electrical Characteristics
Freescale Semiconductor
37
2.14
I2C Input/Output Timing Specifications
Table 23 lists specifications for the I2C input timing parameters shown in Figure 13.
Table 24 lists specifications for the I2C output timing parameters shown in Figure 13.
Table 23. I2C Input Timing Specifications between I2C_SCL and I2C_SDA
Num
Characteristic
Min
Max
Units
11
Start condition hold time
2
t
CYC
—ns
I2
Clock low period
8
t
CYC
—ns
I3
SCL/SDA rise time (VIL = 0.5 V to VIH = 2.4 V)
—
1
ms
I4
Data hold time
0
—
ns
I5
SCL/SDA fall time (VIH = 2.4 V to VIL = 0.5 V)
—
1
ms
I6
Clock high time
4
t
CYC
—ns
I7
Data setup time
0
—
ns
I8
Start condition setup time (for repeated start condition only)
2
t
CYC
—ns
I9
Stop condition setup time
2
t
CYC
—ns
Table 24. I2C Output Timing Specifications between I2C_SCL and I2C_SDA
Num
Characteristic
Min
Max
Units
111
1 Output numbers depend on the value programmed into the IFDR; an IFDR programmed with the
maximum frequency (IFDR = 0x20) results in minimum output timings as shown in Table 24. The I2C
interface is designed to scale the actual data transition time to move it to the middle of the SCL low
period. The actual position is affected by the prescale and division values programmed into the IFDR;
however, the numbers given in Table 24 are minimum values.
Start condition hold time
6
t
CYC
—ns
Clock low period
10
t
CYC
—ns
I32
2 Because SCL and SDA are open-collector-type outputs, which the processor can only actively drive
low, the time SCL or SDA take to reach a high level depends on external signal capacitance and pull-up
resistor values.
I2C_SCL/I2C_SDA rise time
(VIL = 0.5 V to VIH = 2.4 V)
——
s
Data hold time
7
t
CYC
—ns
I53
3 Specified at a nominal 50-pF load.
I2C_SCL/I2C_SDA fall time
(VIH = 2.4 V to VIL = 0.5 V)
—3
ns
Clock high time
10
t
CYC
—ns
Data setup time
2
t
CYC
—ns
Start condition setup time (for repeated start
condition only)
20
t
CYC
—ns
Stop condition setup time
10
t
CYC
—ns
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCF52252AF80 制造商:Freescale Semiconductor 功能描述:32-bit Microcontroller IC
MCF52252CAF66 功能描述:32位微控制器 - MCU KIRIN3 COLDFIRE V2 RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MCF52252CAF66 制造商:Freescale Semiconductor 功能描述:IC 32BIT MCU COLDFIRE/68K 66MHZ LQFP-100
MCF52254AF80 功能描述:32位微控制器 - MCU KIRIN3 COLDFIRE V2 RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MCF52254AF80 制造商:Freescale Semiconductor 功能描述:IC 32BIT MCU COLDFIRE/68K 80MHZ LQFP-100
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