37 / 60 page
IP175A LF
Preliminary Data Sheet
37/60
February 20, 2006
Copyright © 2004, IC Plus Corp.
IP175A LF-DS-R08
4.11
EEPROM register
ROM
MII
Pin name
Description
Default
EEPROM registers 00~01H
0[7:0]
1[7:0]
--
--
EEPROM enable register
This register should be filled with 55AA. IP175A LF will
check the specified pattern to confirm a valid EEPROM
exists. The initial setting is updated after power on reset only
if the specified pattern 55AA is found.
AA
55
ROM
MII
Pin name
Description
(LED output selection register)
Default
EEPROM registers 02H
2[7:2]
--
--
Reserved
6’b0
2[1:0] 12[15:14] LED_SEL[1:0]
Led_sel,
LED mode selection.
LED_SEL[1:0]=00: LED mode 0,
LED_SEL[1:0]=01: LED mode 1,
LED_SEL[1:0]=10: LED mode 2,
LED_SEL[1:0]=11: LED mode 3 (default)
Please refer to pin description for detail LED definition.
11
ROM
MII
Pin name
Description
Default
EEPROM registers 03H
3[7:0]
--
--
Reserved
8’b0
ROM
MII
Pin name
Description
(Switch control register 1)
Default
EEPROM registers 04H
4.7
12.13 X_en
(LED_FULL[0])
X_en,
IEEE 802.3x flow control enable
This signal is used as pause_en for digital parts.
1: enable, 0:disable
1
4[6:5]
--
--
Reserved
2’b0
4.4
12.12 Bk_en
(LED_LINK[1])
Bk_en,
Backpressure enable
1: enable, 0: disable
1
4.3
12.10 Mac_x_en
(RXD1_0)
Mac_x_en,
External Mac port flow control enable
1: enable, 0:disable
1
4.2
12.11 Bf_stm_en
(LED_SPEED[1])
Broadcast storm enable
1: enable
Drop the incoming packet if the number of queued broadcast
packet is over the threshold. The threshold is defined in
register 0AH[14:13].
0: disable
0
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