Datasheet

Micrel, Inc. KS8721BL/SL
June 2009
9
M9999-062509-1.3
Pin Number Pin Name Type
(1)
Pin Function
44 GND Gnd Ground.
45 XO O XTAL feedback: Used with XI for Xtal application.
46 XI I
Crystal Oscillator Input: Input for a crystal or an external 25MHz clock.
If an oscillator is used, XI connects to a 3.3V tolerant oscillator, and X2 is a no-connect.
47 VDDPLL P
Analog PLL 2.5V power supply. See “Circuit Design Ref. for Power Supply” section for
details.
48 RST# Ipu Chip Reset. Active low, minimum of 50µs pulse is required.
Note:
1. P = Power supply.
Gnd = Ground.
I = Input.
O = Output.
I/O = Bi-directional.
Ipd = Input with internal pull-down.
Ipu = Input with internal pull-up.
Ipd/O = Input with internal pull-down during reset; output pin otherwise.
Ipu/O = Input with internal pull-up during reset; output pin otherwise.