ICS1894-40
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
PHYCEIVER
Bit
Definition
When Bit = 0
When Bit = 1
Access 2 SF2
Default3
Hex
20.11
20.10
20.9
LED3 Mode
000 = Link Integrity
001 = activity/no activity
010 = Transmit Data
011 = Receive Data
100 = Collision
101 = 100/10 mode
110 = Full Duplex
111 = OFF (Default LED3)
RW
RW
RW
RW
–
1
1
1
F
20.8
20.7
20.6
LED2 Mode
LED1 Mode
LED0 Mode
000 = Link Integrity
001 = activity/no activity
010 = Transmit Data
011 = Receive Data
100 = Collision
101 = 100/10 mode
110 = Full Duplex
111 = OFF (Default LED2)
1
1
1
E
20.5
20.4
20.3
000 = Link Integrity
001 = activity/no activity
010 = Transmit Data
011 = Receive Data
100 = Collision
101 = 100/10 mode (Default LED1)
110 = Full Duplex
111 = OFF
1
0
1
9
20.2
20.1
20.0
000 = Link Integrity
001 = activity/no activity (Default LED0)
010 = Transmit Data
011 = Receive Data
100 = Collision
0
0
1
101 = 100/10 mode
110 = Full Duplex
111 = LINK_STAT
Register 21h - Extended Control Register
21.15:0 RXER_CNT
Receive error count for RMII mode
RW
0
0
Register 22h - Extended Control Register
22.15
22.14
Interrupt output enable Disable interrupt output
Enable interrupt output
RW
RW
0
0
Interrupt flag read clear Interrupt flag clear by
Interrupt flag clear by read
enable
enable
read disable
22.13
22.12
Interrupt polarity
Output low when
interrupt occur
Output high when
interrupt occur
RW
RW
0
0
Interrupt flag auto clear Interrupt flag unchanged Interrupt flag cleared
enable when interrupt condition when interrupt condition
removed removed
IDT® 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
25
ICS1894-40
REV G 060110
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
