xr82c684 Exar Corporation, xr82c684 Datasheet - Page 68

• Manufacturer Part Number: xr82c684
• Description: Cmos Quad Channel Uart Quart
• Manufacturer: Exar Corporation

D.7 Explanation of Clock Timing Signals
 tCLK - X1/CLK (External) High or Low Time
 fCLK - X1/CLK Crystal High or Low Time
 tCTC - Counter/Timer External Clock High or
the parameter tRTX, which is another spec associated
with the IP2 input.
XR82C684
Low Time - IP2/IP10 Input
Symbol
Please note that this limit has no relationship with
Parameter
Figure 37. Clock Timing
IP2/IP10 Input
 tRTX - RXC and TXC (External) High or Low Time
 fRTX - RXC and TXC (External) Frequency - via
fCTC - Counter/Timer External Clock Frequency -
- via IP3 - IP6, and IP11 - IP14
IP3 - IP6, and IP11 - IP14
Min.
Limits
Typ.
Max.
Units