Hi Team,
Could you let me know about condition of internal D+/D- Data Line Signal Switches of TPS2549 under the following conditions?
At CDP mode:
a) Just after a portable equipment is connected to the TPS2549, before CDP handshaking, Data Line Signal Switches are ON, or OFF?
b) During CDP handshaking, Data Line Switches are ON, or OFF?
c) After CDP handshaking, during communication between Host (MCU) and Device (portable equipment) through the TPS2549, when the Bust Reset signal comes, Data Line Signal Switches will continue ON, or will be OFF?
*Bus Reset signal: D+/D-＜0.8V for longer than 10-ms (Required), D+/D-＜0.8V for longer than 2.5-us (Acceptable)
d) When the portable equipment is disconnected, D+/D-＜0.8V for longer than 2.5-us (Required), D+/D-＜2.0V longer than 2.5-us (Acceptable), how does the TPS2549 detect the disconnect condition? And how Data Line Signal Switches will be, continue ON or become OFF?
At SDP mode:
The same questions,
a)
b)
c)
d)
At CDP-SDP Auto Switch mode:
The same questions,
a)
b)
c)
d)
Thank you.
Best Regards,
Koshi Ninomiya
