Datasheet

 2016-2017 Microchip Technology Inc. DS00002112B-page 11
KSZ8795CLX
Note 2-1 P = power supply; GND = ground; I = input; O = output
I/O = bi-directional
Ipu = Input w/internal pull-up.
Ipd = Input w/internal pull-down.
Ipd/O = Input w/internal pull-down during reset, output pin otherwise.
Ipu/O = Input w/internal pull-up during reset, output pin otherwise.
OTRI = Output tri-stated.
PU = Strap pin pull-up.
PD = Strap pin pull-down.
NC = No connect or tie-to-ground for this product.
67 SCL_MDC Ipu All Clock Input for SPI or MDC/MDIO Interface:
Input clock up to 50 MHz in SPI slave mode.
Input clock up to 25 MHz in MDC/MDIO for MIIM access.
68 SDA_MDIO Ipu/O All Data for SPI or MDC/MDIO Interface:
Serial data input in SPI slave mode.
MDC/MDIO interface data input/output.
69 SPIS_N Ipu All SPI Slave Mode Chip Select (Active-Low):
SPI data transfer start in SPI slave mode. When SPIS_N is
high, the KSZ8795CLX is deselected and SPIQ is held in the
high impedance state. A high-to-low transition initiates the SPI
data transfer. This pin is active-low.
70 VDDIO P — 3.3V, 2.5V or 1.8V digital VDD for digital I/O circuitry.
71 GNDD GND — Digital Ground.
72 RST_N Ipu — Reset: This active-low signal resets the hardware in the device.
See the timing requirements in this section.
73 VDD12D P — 1.2V Core Power.
74 NC NC — No Connect.
75 ATST NC — No Connect. Factory test pin.
76 VDDAT P — 3.3V or 2.5V Analog Power.
77 ISET — Transmit Output Current Set:
This pin configures the physical transmit output current. It
should be connected to GND through a 12.4 k 1% resistor.
78 GNDA GND — Analog Ground.
79 XI I — Crystal Clock Input/Oscillator Input:
When using a 25 MHz crystal, this input is connected to one end
of the crystal circuit. When using a 3.3V oscillator, this is the
input from the oscillator.
The crystal or oscillator should have a tolerance of ±50 ppm.
80 XO O — Crystal Clock Output:
When using a 25 MHz crystal, this output is connected to one
end of the crystal circuit.
TABLE 2-1: SIGNALS - KSZ8795CLX (CONTINUED)
Pin
Number
Pin
Name
Type
Note 2-1
Port Description