The programmed serial clock cycle," />
參數(shù)資料
型號: DSPB56366AG120
廠商: Freescale Semiconductor
文件頁數(shù): 87/110頁
文件大?。?/td> 0K
描述: IC DSP 24BIT AUD 120MHZ 144-LQFP
產(chǎn)品變化通告: Product Discontinuation 24/Feb/2012
標(biāo)準(zhǔn)包裝: 60
系列: DSP56K/Symphony
類型: 音頻處理器
接口: 主機接口,I²C,SAI,SPI
時鐘速率: 120MHz
非易失內(nèi)存: ROM(240 kB)
芯片上RAM: 69kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 3.30V
工作溫度: -40°C ~ 110°C
安裝類型: 表面貼裝
封裝/外殼: 144-LQFP
供應(yīng)商設(shè)備封裝: 144-LQFP(20x20)
包裝: 托盤
DSP56366 Technical Data, Rev. 3.1
3-52
Freescale Semiconductor
3.13.1
Programming the Serial Clock
The programmed serial clock cycle, TI2CCP, is specified by the value of the HDM[7:0] and HRS bits of the
HCKR (SHI clock control register).
The expression for TI2CCP is
where
HRS is the prescaler rate select bit. When HRS is cleared, the fixed divide-by-eight
prescaler is operational. When HRS is set, the prescaler is bypassed.
HDM[7:0] are the divider modulus select bits. A divide ratio from 1 to 256
(HDM[7:0] = $00 to $FF) may be selected.
In I2C mode, the user may select a value for the programmed serial clock cycle from
to
The programmed serial clock cycle (TI2CCP), SCL rise time (TR), and the filters selected should be chosen
in order to achieve the desired SCL serial clock cycle (TSCL), as shown in Table 3-21.
EXAMPLE:
For DSP clock frequency of 120 MHz (i.e. TC = 8.33ns), operating in a standard mode I2C environment
(FSCL = 100 kHz (i.e. TSCL = 10μs), TR = 1000ns), with wide filters enabled:
Choosing HRS = 0 gives
Thus the HDM[7:0] value should be programmed to $41 (=65).
Table 3-21 SCL Serial Clock Cycle (TSCL) generated as Master
Filters bypassed
TI2CCP + 2.5 × TC + 45ns + TR
Narrow filters enabled
TI2CCP + 2.5 × TC + 135ns + TR
Wide filters enabled
TI2CCP + 2.5 × TC + 223ns + TR
T
I
2CCP
T
[
C
2
×
HDM 7:0
[]
(
1
)
71 HRS
() 1
+
×
()
×
+
×]
=
6TC if
×
HDM 7:0
[]
02 and HRS
$
1
==
4096 TC if
×
HDM 7:0
[]
FF and HRS
$
0
==
T
I
2CCP
10
μs 2.5 8.33ns
×
223ns 1000ns
8756ns
==
HDM 7:0
[]
8756ns 2
(
8.33ns
×
8
) 1
64.67
=
×
=
相關(guān)PDF資料
PDF描述
DSPB56367AG150 IC DSP 24BIT 150MHZ 144-LQFP
DSPB56371AF180 IC DSP 24BIT 180MHZ 80-LQFP
DSPB56374AEC IC DSP 24BIT 150MHZ 52-LQFP
DSPB56720CAG DSP 24BIT AUD 200MHZ 144-LQFP
DSPB56724AG DSP 24BIT AUD 250MHZ 144-LQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DSPB56366PV120 制造商:Motorola Inc 功能描述: 制造商:Freescale Semiconductor 功能描述:IC 制造商:MOTOROLA 功能描述:
DSPB56367AG150 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 150Mhz/150MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
DSPB56367PV150 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 150Mhz/ 150MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
DSPB5636AG120 制造商:Freescale Semiconductor 功能描述:
DSPB56371AF150 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 150 MHZ VERSION DSPB371 RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT