KSZ8895MQ_12 MICREL [Micrel Semiconductor], KSZ8895MQ_12 Datasheet - Page 20

• 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)
Notes:
1.
2.
March 2012
Pin Number
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
P = Power supply.
I = Input.
O = Output.
I/O = Bidirectional.
GND = Ground.
IPU = Input w/internal pull-up.
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.
NC = No connect.
PU = Strap pin pull-up.
PD = Strap pull-down.
OTRI = Output tristated.
IN_PWR_SEL
Pin Name
SCANEN
TESTEN
LDO_O
RST_N
TEST2
GNDD
VDDC
GNDA
PS1
PS0
NC
NC
NC
X1
X2
Type
GND
GND
IPD
IPD
IPU
IPD
IPD
IPD
NC
NC
NC
NC
O
P
P
I
(1)
Port
Pin Function
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.”
Reset the KSZ8895MQ/RQ/FMQ/RQ/FMQ device. Active low.
Digital ground.
1.2V digital core V
NC for normal operation. Factory test pin.
NC for normal operation. Factory test pin.
No connect.
25MHz crystal clock connection/or 3.3V Oscillator input.
Crystal/Oscillator should be ±50ppm tolerance.
25MHz crystal clock connection.
No connect.
No connect.
When pin126 is pull-up, the Internal 1.2V LDO controller is
enabled and create 1.2V output with using an external FET.
When pin126 is pull-down (default), the pin 125 is tristated.
Note: Need an external 100K-ohm resistor with pull-up to 3.3V if is
used FET doen’t have an internal resistor between G and S pins.
Pull-up to enable LDO_O of pin 125. Pull-down to disable LDO_0.
Analog ground.
NC for normal operation. Factory test pin.
20
(2)
DD
.
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