- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367801 > PC8245 (Atmel Corp.) Integrated Processor Family PDF資料下載
參數(shù)資料
| 型號： | PC8245 |
| 廠商： | Atmel Corp. |
| 英文描述： | Integrated Processor Family |
| 中文描述： | 綜合處理器系列 |
| 文件頁數(shù)： | 38/61頁 |
| 文件大小： | 429K |
| 代理商： | PC8245 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁當(dāng)前第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁
38
PC8245
2171D–HIREL–06/04
Table 13 provides the I
2
C interface output AC timing specifications for the PC8245 at recommended operating conditions
(see Table “Recommended Operating Conditions” on page 12) with L
V
DD
= 3.3V
±
0.3V.
Notes:
1. Units for these specifications are in SDRAM_CLK units.
2. The actual values depend on the setting of the digital filter frequency sampling rate (DFFSR) bits in the frequency divider
register I2CFDR. Therefore, the noted timings in the above table are all relative to qualified signals. The qualified SCL and
SDA are delayed signals from what is seen in real time on the
I
2
C interface
bus. The qualified SCL, SDA signals are
delayed by the SDRAM_CLK clock times DFFSR times 2 plus 1 SDRAM_CLK clock. The resulting delay value is added to
the value in the table (where this note is referenced). See Figure 19.
3. D
FDR
is the decimal divider number indexed by FDR[5:0] value. Refer to Table 10-5 in the "MPC8245 Integrated Processor
User’s Manual". FDR[x] refers to the frequency divider register I2CFDR bit x. N is equal to a variable number that would
make the result of the divide (data hold time value) equal to a number less than 16. M is equal to a variable number that
would make the result of the divide (data hold time value) equal to a number less than 9.
4. Since SCL and SDA are open-drain type outputs, which the PC8245 can only drive low, the time required for SCL or SDA to
reach a high level depends on external signal capacitance and pull-up resistor values.
5. Specified at a nominal 50 pF load.
Figure 18.
I
2
C Interface Timing Diagram I
Table 13.
I
2
C Interface Output AC Timing Specifications
Number
Characteristics
Min
Max
Unit
Notes
1
Start condition hold time
(FDR[5] == 0) x (D
FDR
/16)/2N +
(FDR[5] == 1) x (D
FDR
/16)/2M
–
CLKs
(1)(2)(3)
2
Clock low period
D
FDR
/2
–
CLKs
(1)(2)(3)
3
SCL/SDA rise time (from 0.5V to 2.4V)
–
–
ms
(4)
4
Data hold time
8.0 + (16 x 2
FDR[4:2]
) x (5 -
4({FDR[5],FDR[1]} == b’10) -
3({FDR[5],FDR[1]} == b’11) -
2({FDR[5],FDR[1]} == b’00) -
1({FDR[5],FDR[1]} == b’01))
–
CLKs
(1)(2)(3)
5
SCL/SDA fall time (from 2.4V to 0.5V)
< 5
ns
(5)
6
Clock high time
D
FDR
/2
–
CLKs
(1)(2)(3)
7
Data setup time (PC8245 as a master only)
(D
FDR
/2) – (Output data hold time)
–
CLKs
(1)(3)
8
Start condition setup time (for repeated start
condition only)
D
FDR
+ (Output start condition hold
time)
–
CLKs
(1)(2)(3)
9
Stop condition setup time
4.0
–
CLKs
(1)(2)
SCL
SDA
VM
VM
6
2
1
4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PC8245MTPU300D | Integrated Processor Family |
| PC8245MTPU333D | Integrated Processor Family |
| PC824A | NPN-OUTPUT DC-INPUT OPTOCOUPLER |
| PC844A | NPN-OUTPUT AC-INPUT OPTOCOUPLER |
| PC844X | PHOTOCOUPLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PC8245MTPU300D | 制造商:e2v Aerospace & Defense 功能描述:MPU MPC82xx RISC 32-Bit 0.25um 300MHz 3.3V 352-Pin TBGA 制造商:e2v technologies 功能描述:MPU MPC82XX RISC 32BIT 0.25UM 300MHZ 3.3V 352TBGA - Trays |
| PC8245MTPU333D | 制造商:e2v Aerospace & Defense 功能描述:MPU MPC82xx RISC 32-Bit 0.25um 333MHz 3.3V 352-Pin TBGA 制造商:e2v technologies 功能描述:MPU MPC82XX RISC 32BIT 0.25UM 333MHZ 3.3V 352TBGA - Trays |
| PC8245MTPU350D | 制造商:e2v technologies 功能描述:PC8245MTPU350D - Trays |
| PC824A | 功能描述:PHOTOCOUPLER 2CH AC INPUT 8-DIP RoHS:否 類別:隔離器 >> 光隔離器 - 晶體管，光電輸出 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 通道數(shù):2 輸入類型:DC 電壓 - 隔離:2500Vrms 電流傳輸比（最小值）:7% @ 16mA 電流傳輸比（最大）:50% @ 16mA 輸出電壓:20V 電流 - 輸出 / 通道:8mA 電流 - DC 正向(If):25mA Vce飽和（最大）:- 輸出類型:有 Vcc 的晶體管 安裝類型:通孔 封裝/外殼:8-DIP（0.400"，10.16mm） 包裝:管件 其它名稱:HCPL-2530W |
| PC825 | 功能描述:PHOTOCOUPLER 2CH DARL OUT 8-DIP RoHS:否 類別:隔離器 >> 光隔離器 - 晶體管，光電輸出 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 通道數(shù):2 輸入類型:DC 電壓 - 隔離:2500Vrms 電流傳輸比（最小值）:7% @ 16mA 電流傳輸比（最大）:50% @ 16mA 輸出電壓:20V 電流 - 輸出 / 通道:8mA 電流 - DC 正向(If):25mA Vce飽和（最大）:- 輸出類型:有 Vcc 的晶體管 安裝類型:通孔 封裝/外殼:8-DIP（0.400"，10.16mm） 包裝:管件 其它名稱:HCPL-2530W |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。