参数资料
型号: TMDXBDKFP5515
厂商: Texas Instruments
文件页数: 53/159页
文件大小: 0K
描述: KIT DEV FINGERPRINT C5515
标准包装: 1
传感器类型: 指纹
接口: USB
电源电压: 5V
嵌入式: 是,MCU,16 位
已供物品: 板,扩展板,线缆,迷你型 DVD,传感器
已用 IC / 零件: C5515
产品目录页面: 718 (CN2011-ZH PDF)
其它名称: 296-27452
SPRS645F – AUGUST 2010 – REVISED OCTOBER 2013
3.3.1.2
Peripheral Clock State
The clock and reset state of each of peripheral is controlled through a set of system registers. The
peripheral clock gating control registers (PCGCR1 and PCGCR2) are used to enable and disable
peripheral clocks. The peripheral software reset counter register (PSRCR) and the peripheral reset control
register (PRCR) are used to assert and de-assert peripheral reset signals.
At hardware reset, all of the peripheral clocks are off to conserve power. After hardware reset, the DSP
boots via the bootloader code in ROM. During the boot process, the bootloader queries each peripheral to
determine if it can boot from that peripheral. In other words, it reads each peripheral looking for a valid
boot image file. At that time, the individual peripheral clocks will be enabled for the query and then
disabled again when the bootloader is finished with the peripheral. By the time the bootloader releases
control to the user code, all peripheral clocks will be off and all domains in the ICR, except the CPU
domain, will be idled.
3.3.1.3
USB Oscillator Control
The USB oscillator is controlled through the USB system control register (USBSCR). To enable the
oscillator, the USBOSCDIS and USBOSCBIASDIS bits must be cleared to 0. The user must wait until the
USB oscillator stabilizes before proceeding with the USB configuration. The USB oscillator stabilization
time is typically 100 μ s, with a 10 ms maximum ( Note: the startup time is highly dependent on the ESR
and capacitive load on the crystal).
Copyright ? 2010–2013, Texas Instruments Incorporated
Product Folder Links: TMS320C5515
Device Configuration
53
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