參數(shù)資料
型號： KSZ9021GQI
廠商： Micrel Inc
文件頁數(shù)： 8/59頁
文件大?。?/td> 0K
描述： TXRX GIG ETH GMII/MII 128-PQFP
標準包裝： 66
類型： 收發(fā)器
驅(qū)動器/接收器數(shù)： 8/8
規(guī)程： 千兆位以太網(wǎng)
電源電壓： 3.135 V ~ 3.465 V
安裝類型： 表面貼裝
封裝/外殼： 128-BFQFP
供應(yīng)商設(shè)備封裝： 128-PQFP（14x20）
包裝： 托盤
其它名稱： 576-3790
Micrel, Inc.
KSZ9021GQ
September 2010
16
M9999-091010-1.2
Pin Number
Pin Name
Type
(1)
Pin Function
99
COL
O
GMII Mode:
GMII COL (Collision Detected) Output
MII Mode:
MII COL (Collision Detected) Output
100
DVDDH
P
3.3V or 2.5V digital VDD
101
INT_N
O
Interrupt Output
This pin provides a programmable interrupt output and requires an external pull-up
resistor to DVDDH (digital VDD) in a range from 1.0KΩ to 4.7KΩ when active low.
Register 1Bh is the Interrupt Control/Status Register for programming the interrupt
conditions and reading the interrupt status. Register 1Fh bit 14 sets the interrupt
output to active low (default) or active high.
102
VSS
Gnd
Digital ground
103
DVDDL
P
1.2V digital VDD
104
VSS
Gnd
Digital ground
105
DVDDL
P
1.2V digital VDD
106
DVDDH
P
3.3V or 2.5V digital VDD
107
CLK125_NDO
O
125MHz Clock Output
This pin provides a 125MHz reference clock output option for use by the MAC.
108
VSSPST
Gnd
Digital ground
109
VSSPST
Gnd
Digital ground
110
RESET_N
Ipu
Chip Reset (active low)
Hardware pin configurations are strapped-in at the de-assertion (rising edge) of
RESET_N. See “Strapping Options” section for more details.
111
NC
-
No connect
112
NC
-
No connect
113
VSS
Gnd
Digital ground
114
DVDDL
P
1.2V digital VDD
115
TX_CLK
O
MII Mode:
MII TX_CLK (Transmit Reference Clock) Output
116
A1
I
Factory test pin – float for normal operation
117
AGNDH
Gnd
Analog ground
118
LDO_O
O
On-chip 1.2V LDO Controller Output
This pin drives the input gate of a P-channel MOSFET to generate 1.2V for the
chip’s core voltages. If 1.2V is provided by the system and this pin is not used, it
can be left floating.
119
AGNDL_PLL
Gnd
Analog ground
120
AVDDL_PLL
P
1.2V analog VDD for PLL
121
AVDDL_PLL
P
1.2V analog VDD for VCO
122
AVDDH
P
3.3V analog VDD
123
XO
O
25MHz Crystal feedback
This pin is a no connect if oscillator or external clock source is used.
124
XI
I
Crystal / Oscillator / External Clock Input
25MHz +/-50ppm tolerance
125
AVDDH
P
3.3V analog VDD
126
ISET
I/O
Set transmit output level
Connect a 4.99K
Ω 1% resistor to ground on this pin
127
AGNDH_BG
Gnd
Analog ground
128
AVDDH
P
3.3V analog VDD
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