KSZ8695PX Micrel Inc, KSZ8695PX Datasheet - Page 19

• Manufacturer Part Number: KSZ8695PX
• Description: IC SWITCH 10/100 1PORT 289PBGA
• Manufacturer: Micrel Inc

Specifications of KSZ8695PX

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 289-PBGA
• Operating Supply Voltage (typ): 1.8V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 289
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: KSZ8695PX-EVAL - EVAL KIT EXPERIMENT ONLY KSZ8695
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 576-1024

System Clock
The clock to the KS8695PX is supplied by either a 25MHz ±50ppm crystal or by an oscillator. If an oscillator is used, it must
be connected to the XCLK1 input (pin E1) on the KS8695PX. If a crystal is used, it must be connected with a circuit similar
to the one shown below. The 25MHz input clock is used by an internal PLL to generate the programmable SDOCLK. SDO-
CLK is the system clock and can be programmed from 25MHz to 125MHz using the system clock and bus control register
at offset 0x0004. The CPUCLKSEL strap-in option on pin M15 needs to be pulled low for normal operation. SDICLK is used
to register the data read from the SDRAM back into the KS8695PX. The system designer must ensure that SDRAM timing
is met when routing SDOCLK back to SDICLK.
September 2005
KS8695PX
1k
M15
URTSN/
CPUCLKSEL
Figure 6. Typical Clock Circuit
22pF
E1
XCLK1
KS8695PX
25MHz
Xtal
XCLK2
19
E2
22pF
SDOCLK
SDICLK
U7
T7
25MHz to 125MHz
To System
M9999-091605
Micrel