1894K-40LF IDT, 1894K-40LF Datasheet - Page 24

• Manufacturer Part Number: 1894K-40LF
• Description: Ethernet ICs 3.3V 10/100 PHY RMII
• Manufacturer: IDT

Specifications of 1894K-40LF

• Rohs: yes
• Part # Aliases: ICS1894K-40LF

IDT® 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
18.3
18.2
18.1
18.0
Register
19.15
19.14
19.13
19.12
19.11
19.10
19.9
19.8
19.7
19.6
19.5
19.4
19.3
19.2
19.1
19.0
Register
ICS1894-40
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
20.15
20.14
20.13
20.12
Bit
19 - Extended Control Register
20 - Extended Control Register
Auto polarity inhibit
SQE test inhibit
Link Loss inhibit
Squelch inhibit
Node Mode
Hardware/Software
Mode Speed Select
Remote Fault
Register Bank select
IDT reserved
AMDIX_EN
MDI_MODE
Twisted Pair Tri-State
Enable, TPTRI
ICS reserved
ICS reserved
ICS reserved
ICS reserved
ICS reserved
ICS reserved
Automatic 100Base-TX
Power Down
Fast-off
LED4 mode
Str_enhance
Definition
Polarity automatically
corrected
Normal SQE test
behavior
Normal Link Loss
behavior
Normal squelch behavior No squelch
Node mode
Use bit00.13 to select
speed
No faults detected
[01]=Bank1, access register0x00~0x13 and registers
[00]=Bank0, access register0x00~0x13, new defined
[1x]=Bank0, same as [00]
Read unspecified
See Table on page 11
See Table on page 11
Twisted Pair Signals are
not Tri-Stated or No
effect
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Do not automatically
power down
Normal digital output
strength
Disable the function
00=Receive data
01=Collision
10=Fullduplex
11=OFF (default LED4)
0x14~0x1F
registers 0x14~0x25
When Bit = 0
Polarity not automatically
corrected
SQE test disabled
Link Always = Link Pass
Repeater mode
Use real time input pin 22
only to select speed
Remote fault detected
Read unspecified
See Table on page 11
See Table on page 11
Twisted Pair Signals are
Tri-Stated
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Power down automatically
Enhance digital output
strength in 1.8V condition
Enable fast-off circuit
When Bit = 1
24
Access
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RO
RO
2
SF
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
ICS1894-40
2
Default
0
0
0
0
L
L
0
0
0
0
1
0
0
0
0
0
0
0
0
1
0
0
1
1
PHYCEIVER
3
REV K 022412
Hex
3
0
–
2
0
1