KSZ8765CLX Datasheet, PDF (11/131 Pages) Microchip Technology – Integrated 5-Port 10/100-Managed Ethernet Switch with Gigabit GMII/RGMII and MII/RMII Interfaces

KSZ8765CLX
TABLE 2-1: SIGNALS - KSZ8765CLX (CONTINUED)
Pin
Number
Pin
Name
Type
Note 2-1
Port
Description
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 KSZ8765CLX 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 V_DD 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
FXSD2
I
2
Fiber signal detect pin for Port 2.
75
FXSD1
I
1
Fiber signal detect pin for Port 1.
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 kΩ 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
Note 2-1
XO
O
— Crystal Clock Output:
When using a 25 MHz crystal, this output is connected to one
end of the crystal circuit.
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.
The KSZ8765CLX can function as a managed switch and utilizes strap-in pins to configure the device for different
modes. The strap-in pins are configured by using external pull-up/down resistors to create a high or low state on the
pins which are sampled during the power-down reset or warm reset. The functions are described in following table.
 2016 Microchip Technology Inc.
DS00002130A-page 11