KSZ8895MQ_12 MICREL [Micrel Semiconductor], KSZ8895MQ_12 Datasheet - Page 16

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

Micrel, Inc.
Pin Description (Continued)
March 2012
Pin Number
64
65
66
67
68
69
70
71
72
73
74
75
76
77
SMTXC/SMREFCLK
Pin Name
PMRXER
SMTXEN
SMTXER
PMRXD1
PMRXD0
SMTXD3
SMTXD2
SMTXD1
SMTXD0
VDDIO
GNDD
PCRS
PCOL
Type
IPD/O
IPD/O
IPD/O
IPD/O
IPD/O
GND
IPD
IPD
IPD
IPD
IPD
IPD
I/O
P
(1)
Port
5
5
5
5
5
PHY[5] MII/RMII receive bit 1.
Strap option:
PD (default) = drop excessive collision packets.
PU = does not drop excessive collision packets.
PHY[5] MII/RMII receive bit 0.
Strap option:
PD (default) = disable aggressive back-off algorithm in half-duplex
mode.
PU = enable for performance enhancement.
MQ/FMQ:PHY[5] MII receive error
RQ: no connection for RMII
Strap option:
PD (default) = packet size 1518/1522 bytes.
PU = 1536 bytes.
MQ/FMQ: PHY[5] MII carrier sense.
RQ: no connection for RMII.
Strap option for port 4 only.
PD (default) = force half-duplex if auto-negotiation is disabled or
fails.
PU = force full-duplex if auto negotiation is disabled or fails. Refer
to Register 76.
MQ/FMQ: PHY[5] MII collision detect.
RQ: no connection.
Strap option for port 4 only.
PD (default) = no force flow control, normal operation.
PU = force flow control. Refer to Register 66.
Port 5 Switch MII/RMII transmit enable.
MQ/FMQ: Port 5 Switch MII transmit bit 3.
RQ: no connection for RMII.
MQ/FMQ: Port 5 Switch MII transmit bit 2.
RQ: no connection for RMII.
Port 5 Switch MII/RMII transmit bit 1.
Port 5 Switch MII/RMII transmit bit 0.
MQ/FMQ: Port 5 Switch MII transmit error.
RQ: no connection for RMII.
MQ/FMQ: Port 5 Switch MII transmit clock,
Input: SW5-MII MAC mode, Output: SW5-MII PHY modes.
RQ: Input SW5-RMII 50MHz +/-50ppm reference clock. The
50MHz clock comes from SMRXC Pin 78 when the device is the
clock mode which the device’s clock comes from 25MHz
crystal/oscillator from pins X1/X2. Or the 50MHz clock comes
from external 50MHz clock source when the device is the normal
mode which the device’s clock source comes from SMTXC pin
not from X1/X2 pins.
Digital ground.
3.3V, 2.5V or 1.8V digital V
16
Pin Function
DD
for digital I/O circuitry.
(2)
KSZ8895MQ/RQ/FMQ
M9999-032612-1.5