參數(shù)資料
型號(hào)： DSP56F801FA80E
廠(chǎng)商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： 16-bit Digital Signal Controllers
中文描述： 16位數(shù)字信號(hào)控制器
文件頁(yè)數(shù)： 25/48頁(yè)
文件大小： 375K
代理商： DSP56F801FA80E
External Clock Operation
56F801 Technical Data, Rev. 16
Freescale Semiconductor
25
3.5.3
The recommended method of connecting an external clock is given in
Figure 3-9
. The external clock
source is connected to XTAL and the EXTAL pin is grounded.
External Clock Source
Figure 3-9 Connecting an External Clock Signal
Figure 3-10 External Clock Timing
3.5.4
An internal relaxation oscillator can supply the reference frequency when an external frequency source or
crystal are not used. During a 56F801 boot or reset sequence, the relaxation oscillator is enabled by default,
and the PRECS bit in the PLLCR word is set to 0 (
Section 3.5
). If an external oscillator is connected, the
relaxation oscillator can be deselected instead by setting the PRECS bit in the PLLCR to 1. When this
occurs, the PRECSS bit in the PLLSR (prescaler clock select status register) data word also sets to 1. If a
changeover between internal and external oscillators is required at startup, internal device circuits
Use of On-Chip Relaxation Oscillator
Table 3-8 External Clock Operation Timing Requirements
3
Operating Conditions:
V
SS
= V
SSA
= 0 V, V
DD
= V
DDA
= 3.0–3.6 V, T
A
= –40
°
to +85
°
C
Characteristic
Symbol
Min
Typ
Max
Unit
Frequency of operation (external clock driver)
1
1.
See
Figure 3-9
for details on using the recommended connection of an external clock driver.
May not exceed 60MHz for the DSP56F801FA60 device.
f
osc
0
—
80
2
2.
3. The high or low pulse width must be no smaller than 6.25ns or the chip will not function.
4. Parameters listed are guaranteed by design.
MHz
Clock Pulse Width
3, 4
t
PW
6.25
—
—
ns
56F801
XTAL
EXTAL
External Clock
V
SS
External
Clock
V
IH
V
IL
Note: The midpoint is V
IL
+ (V
IH
– V
IL
)/2.
90%
50%
10%
90%
50%
10%
t
PW
t
PW
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DSP56F801FA80E 制造商:Freescale Semiconductor 功能描述:IC
DSP56F801PB 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:16-bit Digital Signal Processor
DSP56F802 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controllers
DSP56F802PB 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:56F802 16-Bit Hybrid Controller Product Brief
DSP56F802TA60 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 60Mhz/30MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線(xiàn)寬度:16 bit 程序存儲(chǔ)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
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