KSZ8895MQ_12 MICREL [Micrel Semiconductor], KSZ8895MQ_12 Datasheet - Page 23

• Manufacturer Part Number: KSZ8895MQ_12
• Description: Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface
• Manufacturer: MICREL [Micrel Semiconductor]

Micrel, Inc.
Notes:
1.
March 2012
Pin #
101
102
105
106
113
114
128
NC = No connect.
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.
Pin Name
LED2-2
LED2-1
LED1-1
LED1-0
TEST2
PS1
PS0
PU/PD
IPU/O
IPU/O
IPU/O
IPU/O
IPD
IPD
NC
(1)
Description
LED2 indicator 2.
Strap option for KSZ8895RQ only:
PU (default) = Select the device as clock mode in RQ SW5- RMII, 25MHz
crystal to X1/X2 pins of the device and REFCLK output 50MHz clock.
PD = Select the device as normal mode in SW5-RMII. Switch MAC5 used only.
The input clock is useless from X1/X2 pin, the device’s clock comes from
SMTXC/SMREFCLK pin, 50MHz reference clock from external 50MHz clock
source.
LED2 indicator 1.
Strap option for Port 3 only.
PU (default) = Enable auto-negotiation.
PD = Disable auto-negatiation.
Strap to register60 bit[7].
LED1 indicator 1.
Strap option for Port 3 only.
PU (default) = no force flow control, normal operation.
PD = force flow control. Strap to register50 bit[4].
LED1 indicator 0.
Strap option for Port 3 only.
PU (default) = force half-duplex if auto-negotiation is disabled or fails.
PD = force full-duplex if auto negotiation is disabled or fails.
Strap to register60 bit[5].
Serial bus configuration pin. For this case, if the EEPROM is not present, the
KSZ8895MQ/RQ/FMQ/RQ/FMQ will start itself with the PS[1:0] = 00 default
register values .
Pin Configuration
PS[1:0] = 00
PS[1:0] = 01
PS[1:0] = 10
PS[1:0] = 11
Serial bus configuration pin. See “Pin 113.”
NC for normal operation. Factory test pin.
(1)
23
Serial Bus Configuration
I
SMI Interface Mode
SPI Slave Mode for CPU Interface
Factory Test Mode (BIST)
2
C Master Mode for EEPROM
KSZ8895MQ/RQ/FMQ
M9999-032612-1.5