The programmed" />
參數(shù)資料
型號: DSPB56374AE
廠商: Freescale Semiconductor
文件頁數(shù): 38/64頁
文件大小: 0K
描述: IC DSP 24BIT 150MHZ 52-LQFP
標(biāo)準(zhǔn)包裝: 160
系列: DSP56K/Symphony
類型: 音頻處理器
接口: 主機接口,I²C,SAI,SPI
時鐘速率: 150MHz
非易失內(nèi)存: ROM(84 kB)
芯片上RAM: 54kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 1.25V
工作溫度: -40°C ~ 110°C
安裝類型: 表面貼裝
封裝/外殼: 52-LQFP
供應(yīng)商設(shè)備封裝: 52-LQFP(10x10)
包裝: 托盤
Programming the Serial Clock
DSP56374 Data Sheet, Rev. 4.2
Freescale Semiconductor
43
15
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
TI2CCP = [TC × 2 × (HDM[7:0] + 1) × (7 × (1 – HRS) + 1)]
Eqn. 1
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
6
× TC (if HDM[7:0] = $02 and HRS = 1)
Eqn. 2
to
4096
× TC (if HDM[7:0] = $FF and HRS = 0)
Eqn. 3
The programmed serial clock cycle (TI2CCP) should be chosen in order to achieve the desired SCL serial
clock cycle (TSCL), as shown in Table 23.
Note:
1 V
CORE_VDD = 1.2 5 ± 0.05 V; TJ = -40°C to 110°C (52 LQFP) / -40°C to 105°C (80 LQFP), CL = 50 pF
2 Pull-up resistor: R P (min) = 1.5 kOhm
3 Capacitive load: C b (max) = 50 pF
4 All times assume noise free inputs
5 All times assume internal clock frequency of 150MHz
Table 23. SCL Serial Clock Cycle (TSCL) Generated as Master
Nominal
TI2CCP + 3 × TC + 45ns + TR
Table 22. SHI I2C Protocol Timing (continued)
Standard I2C
No.
Characteristics1,2,3,4,5
Symbol/
Expression
Standard
Fast-Mode
Unit
Min
Max
Min
Max
相關(guān)PDF資料
PDF描述
LM95241CIMM-1/NOPB IC TEMP SENSOR REMOTE DL 8-MSOP
VI-B50-CY-F1 CONVERTER MOD DC/DC 5V 50W
V300A3V3E264B2 CONVERTER MOD DC/DC 3.3V 264W
XC9536XL-10VQ64I IC CPLD 36 MCELL I-TEMP 64-VQFP
LT1761IS5-2.0#TRPBF IC REG LDO 2V .1A TSOT23-5
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DSPB56374AEB 制造商:Freescale Semiconductor 功能描述:52 LQFP PB-FREE W/ BI - Bulk
DSPB56374AEC 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 52 LQFP AUTOMOTIVE 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
DSPB56374AF 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC PB-FREE 80 LQFP 14X14MM 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
DSPB56374AF 制造商:Freescale Semiconductor 功能描述:; Series:DSP56300; DSP Type:Static CMOS
DSPB56374AFC 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 56374 80LQFP AUTOMOTIVE 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