您好:
我们今天有量测CC2564的上电时序,发现我们开发板的时序与规格书中描述的有些差异,请帮忙确认下是否为CC2564未成功上电导致的软体调试问题吧,谢谢!
1.nSHUTD/VDD_IO/VDD_IN/HCI_RST基本同時起來,VDD_IO & VDD_IN與nSHUTD無延時,我理解这个应该是没有问题的吧
2.nSHUTD與HCI_RST之間Delay time為151.7ms>100ms,這是說明CC2564沒有正常上電嗎?
The device indicates that the power-up sequence is complete by asserting RTS low, which occurs up to
100 ms after nSHUTD goes high. If RTS does not go low, the device is not powered up. In this case,
ensure that the sequence and requirements are met.
3.SLOW CLOCK頻率為32.768KHz,頻率正常, 與nSHUTD的Delay time為64.14ms>>2ms
FAST CLOCK頻率為26MHz,頻率正常, 與nSHUTD的Delay time為86.54ms>>20ms
4.BT线路设计