ZHCS894U April 2001 – July 2019 TMS320F2810 , TMS320F2811 , TMS320F2812
PRODUCTION DATA.
请参考 PDF 数据表获取器件具体的封装图。
NO. | MIN | MAX | UNIT | |||
---|---|---|---|---|---|---|
C8 | tc(CI) | Cycle time, XCLKIN | 6.67 | 250 | ns | |
C9 | tf(CI) | Fall time, XCLKIN | Up to 30 MHz | 6 | ns | |
30 MHz to 150 MHz | 2 | |||||
C10 | tr(CI) | Rise time, XCLKIN | Up to 30 MHz | 6 | ns | |
30 MHz to 150 MHz | 2 | |||||
C11 | tw(CIL) | Pulse duration, X1/XCLKIN low as a percentage of tc(CI) | XCLKIN ≤ 120 MHz | 40 | 60 | % |
120 < XCLKIN ≤ 150 MHz | 45 | 55 | ||||
C12 | tw(CIH) | Pulse duration, X1/XCLKIN high as a percentage of tc(CI) | XCLKIN ≤ 120 MHz | 40 | 60 | % |
120 < XCLKIN ≤ 150 MHz | 45 | 55 |
PLL MODE | REMARKS | SYSCLKOUT |
---|---|---|
PLL Disabled | Invoked by tying XPLLDIS pin low upon reset. PLL block is completely disabled. Clock input to the CPU (CLKIN) is directly derived from the clock signal present at the X1/XCLKIN pin. | XCLKIN |
PLL Bypassed | Default PLL configuration upon power-up, if PLL is not disabled. The PLL itself is bypassed. However, the /2 module in the PLL block divides the clock input at the X1/XCLKIN pin by two before feeding it to the CPU. | XCLKIN/2 |
PLL Enabled | Achieved by writing a non-zero value “n” into PLLCR register. The /2 module in the PLL block now divides the output of the PLL by two before feeding it to the CPU. | (XCLKIN * n) / 2 |