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KSZ8721BLI

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P35
Micrel, Inc. KS8721BL/SL
June 2009
22
M9999-062509-1.3
Address Name Description Default
(1)
Mode
7.12 Acknowledge 2
1 = will comply with message
0 = cannot comply with message
RW 0
7.11 Toggle
1 = previous value of the transmitted link code word equaled
logic One
0 = logic Zero
RO 0
7.10:0 Message Field 11-bit wide field to encode 2048 messages RW 001
Register 8h - Link Partner Next Page Ability
8.15 Next Page
1 = additional next page(s) will follow
0 = last page
RO 0
8.14 Acknowledge
1 = successful receipt of link word
0 = no successful receipt of link word
RO 0
8.13 Message Page
1 = Message Page
0 = unformatted page
RO 0
8.12 Acknowledge 2
1 = able to act on the information
0 = not able to act on the information
RO 0
8.11 Toggle
1 = previous value of transmitted link code word equal to
logic zero
0 = previous value of transmitted link code word equal to
logic one
RO 0
8.10:0 Message Field RO 0
Register 15h - RXER Counter
15.15:0 RXER Counter RX Error counter for the RX_ER in each package RO 000
Register 1bh - Interrupt Control/Status Register
1b.15 Jabber Interrupt Enable
1 = Enable jabber interrupt
0 = Disable jabber interrupt
RW 0
1b.14
Receive Error
Interrupt Enable
1 = Enable receive error interrupt
0 = Disable receive error interrupt
RW 0
1b.13
Page Received
Interrupt Enable
1 = Enable page received interrupt
0 = Disable page received interrupt
RW 0
1b.12
Parallel Detect Fault
Interrupt Enable
1 = Enable parallel detect fault interrupt
0 = Disable parallel detect fault interrupt
RW 0
1b.11
Link Partner Acknowledge
Interrupt Enable
1 = Enable link partner acknowledge interrupt
0 = Disable link partner acknowledge interrupt
RW 0
1b.10
Link Down
Interrupt Enable
1 = Enable link down interrupt
0 = Disable link down interrupt
RW 0
1b.9
Remote Fault
Interrupt Enable
1 = Enable remote fault interrupt
0 = Disable remote fault interrupt
RW 0
1b.8 Link Up Interrupt Enable
1 = Enable link up interrupt
0 = Disable link up interrupt
RW 0
1b.7 Jabber Interrupt
1 = Jabber interrupt occurred
0 = Jabber interrupt has not occurred
RO/SC 0
1b.6 Receive Error Interrupt
1 = Receive error occurred
0 = Receive error has not occurred
RO/SC 0
1b.5 Page Receive Interrupt
1 = Page receive occurred
0 = Page receive has not occurred
RO/SC 0
1b.4
Parallel Detect
Fault Interrupt
1 = Parallel detect fault occurred
0 = Parallel detect fault has not occurred
RO/SC 0
Micrel, Inc. KS8721BL/SL
June 2009
23
M9999-062509-1.3
Address Name Description Default
(1)
Mode
1b.3
Link Partner
Acknowledge Interrupt
1 = Link partner acknowledge occurred
0 = Link partner acknowledge has not occurred
RO/SC 0
1b.2 Link Down Interrupt
1 = Link down occurred
0 = Link down has not occurred
RO/SC 0
1b.1 Remote Fault Interrupt
1 = Remote fault occurred
0 = Remote fault has not occurred
RO/SC 0
1b.0 Link Up Interrupt
1 = Link up interrupt occurred
0 = Link up interrupt has not occurred
RO/SC 0
Register 1fh - 100BASE-TX PHY Controller
1f.15:14 Reserved RO 0
1f.13 Pairswap Disable
1 = Disable MDI/MDI-X
0 = Enable MDI/MDI-X
RW 0
1f.12 Energy Detect
1 = Presence of signal on RX+/RX- analog wire pair
0 = No signal detected on RX+/RX-
RO 0
1f.11 Force Link
1 = Force link pass
0 = Normal link operation
This bit bypasses the control logic and allow transmitter to
send pattern even if there is no link.
RW 0
1f.10 Power-Saving
1 = Enable power-saving
0 = Disable
RW 1
1f.9 Interrupt Level
1 = Interrupt pin active high
0 = Active low
RW 0
1f.8 Enable Jabber
1 = Enable jabber counter
0 = Disable
RW 1
1f.7 Auto-Negotiation Complete
1 = Auto-negotiation complete
0 = Not complete
RW 0
1f.6
Enable Pause
(Flow-Control Result)
1 = Flow control capable
0 = No flow control
RO 0
1f.5 PHY Isolate
1 = PHY in isolate mode
0 = Not isolated
RO 0
1f.4:2 Operation Mode Indication
[000] = Still in auto-negotiation
[001] = 10BASE-T half-duplex
[010] = 100BASE-TX half-duplex
[011] = Reserved
[101] = 10BASE-T full-duplex
[110] = 100BASE-TX full-duplex
[111] = PHY/MII isolate
RO 0
1f.1 Enable SQE Test
1 = Enable SQE test
0 = Disable
RW 0
1f.0 Disable Data Scrambling
1 = Disable scrambler
0 = Enable
RW 0
Note:
1. RW = Read/Write.
RO = Read Only.
SC = Self Clear.
LH = Latch High.
LL = Latch Low.
Some of the default values are set by strap-in. See “Strapping Options.”
Micrel, Inc. KS8721BL/SL
June 2009
24
M9999-062509-1.3
Absolute Maximum Ratings
(1)
Storage Temperature (T
s
) .........................–55°C to +150°C
Supply Referenced to GND.......................... –0.5V to +4.0V
All Pins ......................................................... –0.5V to +4.0V
Operating Ratings
(2)
Supply Voltage
(V
DD_PLL
, V
DD_TX
, V
DD_RXC
, V
DD_RCV
, V
DDC
) ......... +2.5V
(V
DDIO
).............................................................. +3.3V
Ambient Temperature (T
A
)
Commercial ......................................... 0°C to +70°C
Industrial.......................................... –40°C to +85°C
Package Thermal Resistance
(3)
LQFP(θ
JA
)
No Airflow ........................................... 83.56°C/W
SSOP(θ
JA
)
No Airflow ........................................... 75.19°C/W
Electrical Characteristics
(4)
V
DD
= 3.3V ±10%
Symbol Parameter Condition Min Typ Max Units
Total Supply Current (including TX output driver current)
(5)
I
DD1
Normal 100BASE-TX Including 43mA output current 116 mA
I
DD2
Normal 100BASE-TX
(Independent of utilization)
Including 103mA output current 151 mA
I
DD3
Power Saving Mode 1 Auto-negotiation is Enable 47 mA
I
DD5
Power Down Mode 4 mA
TTL Inputs
V
IH
Input High Voltage
1/2V
DD
(I/O)
+0.2
V
V
IL
Input Low Voltage 0.8 V
I
IN
Input Current
V
IN
= GND ~ V
DDIO
–10 10 µA
TTL Outputs
V
OH
Output High Voltage I
OH
= –4mA
1/2V
DD
(I/O)
+0.6
V
V
OL
Output Low Voltage I
OL
= 4mA 0.4 V
I
OZ
Output Tri-state Leakage 10 µA
100Base-TX Receive
RX+/RX– Differential Input
Resistance
8 k
R
IN
Propagation Delay from magnetics to RDTX 50 110 ns
10Base-TX Transmit (measured differentially after 1:1 transformer)
V
O
Peak Differential Output Voltage
50
Ω from each output to V
DD
0.95 1.05 V
V
IMB
Output Voltage Imbalance
50
Ω from each output to V
DD
2 %
Rise/Fall Time 3 5 ns
Rise/Fall Time Imbalance 0 0.5 ns
Duty Cycle Distortion ±0.5 ns
t
r
, t
f
Overshoot 5 %
Reference Voltage of ISET 0.75 V
Propagation Delay from TDTX to magentics 45 60 ns
V
SET
Jitters 0.7 1.4 ns
(pp)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P35

KSZ8721BLI

Mfr. #:
Buy KSZ8721BLI
Manufacturer:
Microchip Technology / Micrel
Description:
Ethernet ICs 10/100 BASE-TX/FX Physical Layer Transceiver
Lifecycle:
New from this manufacturer.
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