Datasheet

KSZ8895MQX/RQX/FQX/MLX
DS00002246A-page 52  2016 Microchip Technology Inc.
6
Port 5 SW5-
RMII
reference
clock edge
select
RQX: Select the data sampling edge of Switch
MAC5 SW5-RMII reference clock:
1 = data sampling on negative edge of refclk
0 = data sampling on positive edge of refclk
(default)
Note: MQX/FQX/MLX is reserved with read-only for
this bit.
R/W 0
5 Reserved N/A Do not changes. RO 0
4 Reserved N/A Do not changes. RO 0
3
PHY Power
Save
1 = disable PHY power save mode.
0 = enable PHY power save mode.
R/W 0
2 Reserved N/A Do not changes. RO 0
1LED Mode
0 = led mode 0.
1 = led mode 1.
Mode 0, link at
100/Full LEDx[2,1,0] = 0,0,0
100/Half LEDx[2,1,0] = 0,1,0
10/Full LEDx[2,1,0] = 0,0,1
10/Half LEDx[2,1,0] = 0,1,1
Mode 1, link at
100/Full LEDx[2,1,0] = 0,1,0
100/Half LEDx[2,1,0] = 0,1,1
10/Full LEDx[2,1,0] = 1,0,0
10/Half LEDx[2,1,0] = 1,0,1
(0 = LED on, 1 = LED off)
R/W
0
Pin SMRXD0 strap
option.
Pull-down(0):
Enabled led mode 0.
Pull-up(1): Enabled
led mode 1.
Note: SMRXD0 has
internal pull-down 0.
0
SPI/SMI read
sampling
clock edge
select
Select the SPI/SMI clock edge for sampling SPI/
SMI read data
1 = trigger by rising edge of SPI/SMI clock (for high
speed SPI about 25 MHz and SMI about 10 MHz)
0 = trigger by falling edge of SPI/SMI clock
R/W 0
Register 12 (0x0C): Global Control 10
7 Reserved Reserved RO 0
6
Status of
device with
RMII inter-
face at clock
mode or nor-
mal mode,
default is
clock mode
with 25MHz
Crystal clock
from pins X1/
X2
(used for RMII
of the
KSZ8895RQX
only)
1 = The device is in clock mode when use RMII
interface, 25 MHz Crystal clock input as clock
source for internal PLL. This internal PLL will pro-
vide the 50 MHz output on the pin SMRXC for RMII
reference clock (Default).
0 = The device is in normal mode when use SW4-
RMII interface and 50 MHz clock input from exter-
nal clock through pin SM4TXC as device’s clock
source and internal PLL clock source from this pin
not from the 25 MHz crystal.
Note: This bit is set by strap option only. Write to
this bit has no effect on mode selection.
Note: The normal mode is used in SW5-RMII inter-
face reference clock from external.
RO
1
Pin LED[2][2] strap
option.
PD(0): Select SW5-
RMII at normal mode
to receive external
50 MHz RMII refer-
ence clock
PU(1): (default)
Select SW5-RMII at
clock mode, RMII out-
put 50 MHz
Note: LED[2][2] has
internal pull-up.
TABLE 4-2: GLOBAL REGISTER DESCRIPTIONS (CONTINUED)
Address Name Description Mode Default
Mode 0 Mode 1
LEDx_2 Link/Activity 100Link/Activity
LEDx_1 Full-Duplex/Col 10Link/Activity
LEDx_0 Speed Full-Duplex