Datasheet

 2016-2017 Microchip Technology Inc. DS00002112B-page 53
KSZ8795CLX
Register 9 (0x09): Global Control 7
7 - 0 Factory
Testing
N/A Don’t Change RO 0x40
Register 10 (0x0A): Global Control 8
7 - 0 Factory
Testing
N/A Don’t Change RO 0x00
Register 11 (0x0B): Global Control 9
7 Reserved N/A Don’t Change RO 0
6 Port 5 SW5- RMII Refer-
ence Clock Edge Select
Select the data sampling edge of the SW5- RMII
reference clock:
1 = Data sampling on the negative edge of REF-
CLK.
0 = Data sampling on the positive edge of REFCLK
(default).
R/W 0
5  4 LED Mode Programmable LED output to indicate port’s activ-
ity/status using 2 bits of the control register. LED is
ON (active) when the output is LOW; the LED is
OFF (inactive) when the output is HIGH.
LINK = LED ON; ACT = LED Blink;
LINK/ACT = LED On/Blink.
Speed = LED ON (100BT); LED OFF (10BT); LED
Blink (1000BT reserved).
Duplex = LED ON (Full duplex); LED OFF (half
duplex).
R/W 00
3 Reserved N/A Don’t change. RO 0
2 Reserved N/A Don’t change. RO 0
1 REFCLKO Enable 1 = Enable REFCLKO pin clock output
0 = Disable REFCLKO pin clock output.
Strap-in option: LED2_0
PU = REFCLK_O (25 MHz) is enabled. (Default)
PD = REFCLK_O is disabled
Note: This is an additional clock; this clock
can save an oscillator if system needs
this clock source. If the system doesn’t
need this 25 MHz clock source, which
should be disabled.
R/W 0
0 SPI Read Sampling
Clock Edge Select
Select the SPI clock edge for sampling SPI read
data.
1 = Trigger on the rising edge of SPI clock (for
higher speed SPI)
0 = Trigger on the falling edge of SPI clock.
R/W 0
Register 12 (0x0C): Global Control 10
7  6 Reserved Reserved RO 01
TABLE 4-3: GLOBAL REGISTERS (CONTINUED)
Address Name Description Mode Default