KSZ8895MQ_12 Datasheet, PDF (63/116 Pages) Micrel Semiconductor – Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface

Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Global Registers (Continued)
Address Name
5
PLL Power Down
Description
Pll power down enable:
1 = Enable
0 = Disable
4–3
Power Management Mode
Power management mode :
00 = Normal mode (D0)
01 = Energy Detection mode (D2)
10 = soft Power Down mode (D3)
11 = Power Saving mode (D1)
2-0
Reserved
N/A Do not change.
Register 15 (0x0F): Power Down Management Control 2
7–0
Go_sleep_time[7:0]
When the Energy Detect mode is on, this value is
used to control the minimum period that the no energy
event has to be detected consecutively before the
device enters the low power state. The unit is 20 ms.
The default of go_sleep time is 1.6 seconds (80Dec x
20ms).
Mode
Default
R/W
0
00
Pin LED[4][0]
strap option.
PD(0): Select
Energy detection
R/W mode
PU(1): (default)
Normal mode
Note: LED[4][0]
has internal pull-
up.
RO
000
R/W
01010000
March 2012
63
M9999-032612-1.5