參數(shù)資料
型號： MC56F8123
廠商： Motorola, Inc.
英文描述： 16-bit Hybrid Controllers
中文描述： 16位混合控制器
文件頁數(shù)： 63/140頁
文件大?。?/td> 1981K
代理商： MC56F8123
Use of On-Chip Relaxation Oscillator
56F8323 Technical Data, Rev. 11.0
Freescale Semiconductor
29
Preliminary
Figure 3-2 Connecting a Ceramic Resonator
Note:
The OCCS_COHL bit must be set to 0 when a crystal resonator is used. The reset condition on the
OCCS_COHL bit is 0. Please see the COHL bit in the Oscillator Control (OSCTL) register, discussed
in the 56F8300 Peripheral User Manual.
3.2.3
External Clock Source
The recommended method of connecting an external clock is illustrated in Figure 3-3. The external clock source is
connected to XTAL and the EXTAL pin is grounded.
The external clock input must be generated using a
relatively low impedance driver, as the XTAL pin is actually the output pin of the oscillator (it has a very
weak driver).
Figure 3-3 Connecting an External Clock Signal
3.3 Use of On-Chip Relaxation Oscillator
An internal relaxtion oscillator can supply the reference frequency when an external frequency source of
crystal is not used. During a boot or reset sequence, the relaxation oscillator is enabled by default, and the
PRECS bit in the PLLCR word is set to 0. If an external oscillator is connected, the relaxation oscillator
can be deselected instead by setting the PRECS bit in the PLLCR to 1. If a changeover between internal
and external oscillators is required at start up, internal device circuits compensate for any asynchronous
transitions between the two clock signals so that no glitches occur in the resulting master clock to the chip.
When changing clocks, the user must ensure that the clock source is not switched until the desired clock
is enabled and stable.
To compensate for variances in the device manufacturing process, the accuracy of the relaxation oscillator
can be incrementally adjusted to within + 0.1% of 8MHz by trimming an internal capacitor. Bits 0-9 of the
EXTAL XTAL
Rz
Sample External Ceramic Resonator Parameters:
Rz = 750 K
EXTAL XTAL
Rz
C1
CL1
CL2
C2
Resonator Frequency = 4 - 8MHz (optimized for 8MHz)
3 Terminal
2 Terminal
CLKMODE = 0
XTAL
EXTAL
External
VSS
Clock
Note: When using an external clocking
source with this configuration, the
“CLKMODE” and COHL bits of the OSCTL
register should be set to 1.
相關(guān)PDF資料
PDF描述
MC56F8323 16-bit Hybrid Controllers
MC56MS-14 3500 MHz - 12000 MHz RF/MICROWAVE DOUBLE BALANCED MIXER, 9.5 dB CONVERSION LOSS-MAX
MC56MS-5 3500 MHz - 12000 MHz RF/MICROWAVE DOUBLE BALANCED MIXER, 9.5 dB CONVERSION LOSS-MAX
MC68HC11FC0CFU4 Technical Summary 8-Bit Microcontroller
MC68HC11FC0CFU5 Technical Summary 8-Bit Microcontroller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC56F8123VFB 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-bit Hybrid Controllers
MC56F8123VFBE 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 16 BIT HYBRID CONTROLLER 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(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)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
MC56F8135 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controller
MC56F8135E 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controller
MC56F8135VFGE 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 16 BIT HYBRID CNTRLR 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(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)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
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*