Hi,
I meet an issue by using TUSB320 in DRP mode.
The problem is: CSR Registers 0x09 [7:6] ATTACHED_STATE keeps reading as 00, after plugging in power source or device.
However, when I use the demo board TUSB320 EVM REVB, CSR Registers 0x09 [7:6] ATTACHED_STATE can update value quickly.
I attach my schematic at below.
I hope someone can give me some suggues
figure 1: unattached
figure 2: no Vbus
figure 3: ID does not go to low.
In figure 1, 2, 3, Channel 1 is cc1, Channel 2 is cc2, Channel 3 is Vbus, and Channel 4 is ID.
Figure 1 shows the status without attaching any devices.
However, when I plugged in a device, I got two results. one shows in figure 2 and another one is in figure 3.
Figure 2 shows ID pin goes to low, but chip cannot detect VBUS.
Figure 3 shows chip can detect VBUS, but ID pin keep high.
I got both result randomly, when I plug and unplug a device.
