ZHCS747D January 2012 – September 2021 LMK01801
PRODUCTION DATA
There are two input buffer types for CLKin0 and CLKin1: bipolar or CMOS. Bipolar is recommended for differential inputs such as LVDS and LVPECL. CMOS is recommended for DC coupled single ended inputs.
When using bipolar, CLKinX and CLKinX* input pins must be AC coupled when using differential or single ended input.
When using CMOS, CLKinX and CLKinX* input pins may be AC or DC coupled with a differential input.
When using CMOS in a single ended mode, the used clock input pin (CLKinX or CLKinX*) may be AC or DC coupled to the signal source. The unused CLKin shouLd be AC coupled to ground.
The programming address table shows at what register the specified CLKinX_BUF_TYPE is located.
The CLKinX_BUF_TYPE table shows the programming definition for these registers.
| CLKinX_BUF_TYPE | Programming Address |
|---|---|
| CLKin0_BUF_TYPE | R0[10] |
| CLKin1_BUF_TYPE | R0[11] |
| R0[10] | CLKinX Buffer Type |
|---|---|
| 0 | Bipolar |
| 1 | CMOS |