KSZ8895MQ_12 MICREL [Micrel Semiconductor], KSZ8895MQ_12 Datasheet - Page 69

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

Micrel, Inc.
Port Registers (Continued)
Register 27 (0x1B): Reserved
Register 43 (0x2B):
Register 59 (0x3B):
Register 75 (0x4B):
Register 91 (0x5B):
Register 28 (0x1C): Port 1 Control 5
Register 44 (0x2C): Port 2 Control 5
Register 60 (0x3C): Port 3 Control 5
Register 76 (0x4C): Port 4 Control 5
Register 92 (0x5C): Port 5 Control 5
March 2012
Address
7-0
Address
7
6
5
Name
Reserved
Name
Disable Auto-Negotiation
Forced Speed
Forced Duplex
Reserved
Reserved
Reserved
Reserved
Description
1, disable auto-negotiation, speed and duplex are
decided by bit 6 and 5 of the same register.
0, auto-negotiation is on.
Note: The register bit value is the INVERT of the strap
value at the pin.
1, forced 100BT if AN is disabled (bit 7).
0, forced 10BT if AN is disabled (bit 7).
1, forced full-duplex if (1) AN is disabled or (2) AN is
enabled but failed.
0, forced half-duplex if (1) AN is disabled or (2) AN is
enabled but failed (Default).
Description
N/A Do not change.
69
Mode
R/W
R/W
R/W
Mode
RO
KSZ8895MQ/RQ/FMQ
For Port 3/Port 4
only. INVERT of
pins
LED[2][1]/LED[5][0]
strap option.
PD(0): Disable
Auto-Negotiation.
PU(1): Enable
Auto-Negotiation.
Note:
LED[2][1]/LED[5][0]
have internal pull
up.
For Port 3/Port 4
only. Pins
LED1_0/PCRS
strap option:
1). Force half-
duplex mode:
LED1_0 pin Pull-
up(1) (default) for
Port 3
PCRS pin Pull-
down (0) (default)
for Port 4
2). Force full-
Duplex mode:
LED1_0 pin Pull-
down(0) for Port 3
PCRS Pull-up (1)
for Port 4.
Note: LED1_0 has
internal pull-up;
PCRS have
internal pull down.
M9999-032612-1.5
Default
Default
0
0
1
0