
LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
Datasheet
Document Number: 249241
Revision Number: 007
Revision Date: August 28, 2003
211
Table 94. Interrupt Enable Register (Address 18, Hex 12)
Bit
Name
Description
Type
1
Default
15:14
2
RxFIFO Initial
Fill
00 =Reserved
01 =Low, 16 bits
10 =Normal, 32 bits (default)
11 = Jumbo packets, 128 bits
R/W
LSHR
4,5
13
SFD Frame
Alignment
(RxDV asserts
with CRS when
enabled)
10 Mbps
When Register bit 16.5 = 1, preamble is
not suppressed.
R/W
0
0 = Disabled
1 = Enabled
When Register bit 16.5 = 0, SFD is always
aligned, and preamble is suppressed.
100 Mbps
0 = Disabled
1 = Enabled
R/W
0
When enabled, all but one byte of
preamble is suppressed.
12:9
Reserved
Write as 0, ignore on Read
R/W
0000
8
CNTRMSK
Mask for Counter Full
0 = Do not allow event to cause interrupt
1 = Enable event to cause interrupt
R/W
0
7
ANMSK
Mask for Auto-Negotiate Complete
0 = Do not allow event to cause interrupt
1 = Enable event to cause interrupt
R/W
0
6
SPEEDMSK
Mask for Speed Interrupt
0 = Do not allow event to cause interrupt
1 = Enable event to cause interrupt
R/W
0
5
DUPLEXMSK
Mask for Duplex Interrupt
0 = Do not allow event to cause interrupt
1 = Enable event to cause interrupt
R/W
0
4
LINKMSK
Mask for Link Status Interrupt
0 = Do not allow event to cause interrupt
1 = Enable event to cause interrupt
R/W
0
3
ISOLMSK
Mask for Isolate Interrupt
0 = Do not allow event to cause interrupt
1 = Enable event to cause interrupt
R/W
0
2
Reserved
Write as 0, ignore on Read
R/W
0
1
INTEN
0 = Disable interrupts on this port
1 = Enable interrupts on this port
R/W
0
0
TINT
0 = Normal operation
1 = Test force interrupt on MDINT
R/W
0
1. R/W = Read/Write
2. In 10 Mbps operation, Register bit 18.13 = 1 cannot be used when Register bits 18.15:14 = “11” and in
RMII mode, Registers bits 18.15:14 = “11” or “10” cannot be used because the minimum Inter Gap Packet
becomes less than specified in the *IEEE 802.3 specification.
3. SFD Frame Alignment is applicable to SMII and SS-SMII only.
4.
LSHR = Default value is derived from a single device input pin state or a group of device input pin states as
the pin(s) are latched at startup or hardware reset
Table 17, “Intel
LXT9785/LXT9785E Receive FIFO Depth Considerations” on page 50
).