參數(shù)資料
型號: EP7212
廠商: Cirrus Logic, Inc.
英文描述: HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)
中文描述: 高性能,低功耗系統(tǒng)與LCD控制器和數(shù)字音頻接口(DAI芯片)
文件頁數(shù): 26/136頁
文件大?。?/td> 2289K
代理商: EP7212
EP7212
26
DS474PP1
The output clock pin (i.e., MOSCOUT) should be
left floating.
3.5.2
External Clock Input (13 MHz)
An external 13 MHz crystal oscillator can be used
to drive all of the EP7212. When selected the
ARM720T and the address/data buses both get
clocked at 13 MHz. The fixed clock sources to the
various peripherals will have different frequencies
than in the PLL mode. In this configuration, the
PLL will not be used at all.
NOTE:
When
CLKCTL[1:0] bits should not be changed
from their default value of ‘00’.
operating
at
13 MHz,
the
3.5.3 Dynamic Clock Switching When in the
PLL Clocking Mode
The clock frequency used for the CPU and the bus-
es is controlled by programming the CLKCTL[1:0]
bits in the SYSCON3 register. When this occurs,
the state controller switches from the current to the
new clock frequency as soon as possible without
causing a glitch on the clock signals. The glitch-
free clock switching logic waits until the clock that
is currently in use and the newly programmed clock
source are both low, and then switches from the
previous clock to the new clock without a glitch on
the clocks.
Figure 4. CLKEN Timing Entering the Standby State
13 MHz
CLKEN
EXPCLK
(internal)
RUN
Interrupt /
WAKEUP
CLKEN
Figure 5. CLKEN Timing Entering the Standby State
相關(guān)PDF資料
PDF描述
EP7212-CB-A HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)
EP7212-CV-A HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)
EP7309 HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE
EP7309-CB-C CONN MODULAR JACK 8-8 R/A UNSHLD
EP7309-CR-C HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EP7212-CB-A 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)
EP7212-CV-A 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)
EP7212-CV-D 制造商:Rochester Electronics LLC 功能描述:- Bulk
EP7230 功能描述:電氣外殼配件 E-PANEL FITS 72 X 30 RoHS:否 制造商:Hammond Manufacturing 產(chǎn)品:Rack Accessories 類型: 面板寬度: 面板高度: 外部寬度: 外部高度: 外部深度: 顏色:Black
EP7236 功能描述:電氣外殼配件 E-PANEL FITS 72 X 36 RoHS:否 制造商:Hammond Manufacturing 產(chǎn)品:Rack Accessories 類型: 面板寬度: 面板高度: 外部寬度: 外部高度: 外部深度: 顏色:Black