ICS1894-40 Datasheet, PDF (24/52 Pages) Integrated Device Technology – 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE

ICS1894-40
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
PHYCEIVER
Bit
Definition
When Bit = 0
When Bit = 1
19.3 ICS reserved
Read unspecified
Read unspecified
19.2 ICS reserved
Read unspecified
Read unspecified
19.1 ICS reserved
Read unspecified
Read unspecified
19.0 Automatic 100Base-TX Do not automatically
Power Down
power down
Power down automatically
Register 20h - Extended Control Register
20.15
Str_enhance
Normal digital output
strength
Enhance digital output
strength in 1.8V condition
20.14
Fast_off
disable the function
Enable fast_off circuit
20.13:
12
LED4 Mode
00 = Receive Data
01 = Collision
10 = Full Duplex
11 = OFF (Default LED4)
20.11:
9
LED3 Mode
000 = Link Integrity
001 = activity/no activity
010 = Transmit Data
011 = Receive Data
100 = Collision
101 = 10/100 mode
110 = Full Duplex
111 = OFF (Default LED3)
20.8:6
LED2 Mode
000 = Link Integrity
001 = activity/no activity
010 = Transmit Data
011 = Receive Data
100 = Collision
101 = 10/100 mode
110 = Full Duplex
111 = OFF (Default LED2)
20.5:3
LED1 Mode
000 = Link Integrity
001 = activity/no activity
010 = Transmit Data
011 = Receive Data
100 = Collision
101 = 10/100 mode (Default LED1)
110 = Full Duplex
111 = OFF
20.2:0
LED0 Mode
000 = Link Integrity
001 = activity/no activity (Default LED0)
010 = Transmit Data
011 = Receive Data
100 = Collision
101 = 10/100 mode
110 = Full Duplex
111 = LINK_STA
Register 21h - Extended Control Register
Ac-
cess
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
SF De- Hex
fault
–
0
1
–
0
–
0
–
1
0
0
3
7
7
5
1
IDT™ / ICS™ 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE 24
ICS1894-40 REV C 092909