MTD981AF 데이터 시트보기 (PDF) - Myson Century Inc
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MTD981AF Datasheet PDF : 18 Pages
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MYSON
TECHNOLOGY
MTD981A
1 = repeater mode; 0 or floating = normal. Weakly pull down.
ISODEF I,D 2 7 Isolate Default
1 =isolation; 0 or floating = normal. Weakly pull down.
ISO
I,D 3 8 Isolate
1 =isolation; 0 or floating = normal. Weakly pull down.
RST_
I,U 8 13 Pin Reset select.
0=reset; 1or floating = normal. Weakly pull up
RMIISEL I,D 6 11 RMII mode select.
1 = RMII mode; 0 or floating = normal (MII mode).
Weakly pull down.
When RMII mode is selected, MTD981A will assume the 50MHz
oscillator is used as base clock.
ANEN
I,U 56 71 Auto-Negotiation enable
1 = enable Auto-Negotiation; 0 = disable Auto-Negotiation.
Weakly pull up.
SEL2
I,U 53 68 Operation mode select, bit 2. Used only when autonegotiation is
disabled. Weakly pull up.
SEL2 SEL1 SEL0 operation mode
X 0 0 mode select by MII registers
0
0 1 10BaseT, half duplex
0
1
X 100BaseT, half duplex
1
0 1 10BaseT, full duplex
1
1
X 100BaseT, full duplex
SEL1
I,U 54 69 Operation mode select, bit 1. Weakly pull up.
SEL0
I,U 55 70 Operation mode select, bit 0. Weakly pull up.
PHYAD0 I,U 18 23 PHY Address bit 0. Weakly pull up.
PHYAD1 I,U 17 22 PHY Address bit 1. Weakly pull up.
PHYAD2 I,U 16 21 PHY Address bit 2. Weakly pull up.
PHYAD3 I,U 15 20 PHY Address bit 3. Weakly pull up.
PHYAD4 I,U 14 19 PHY Address bit 4. Weakly pull up.
TP125
IO,D 20 25 Value latched in while reset to select transformer turns ratio.
=1 to select the transmit transformer with ratio 1.25:1
=0 to select the transmit transformer with ratio 1:1 (default)
Works as link_established after reset.
Weakly pull down.
MODE1 I,D 19 24 Test mode select bit 1. Weakly pull down.
MODE0 I,D 1 6 Test mode select bit 0. Weakly pull down.
TEST2
O 68 88 Used as the test mode output monitor pin
NC0
74 94 No Connection
NC1
75 95 No Connection
NC2
-
1
NC3
-
2
NC4
-
3
NC5
-
4
NC6
-
5
NC7
-
26
NC8
-
27
NC9
-
28
NC10
-
29
NC11
-
30
NC12
-
51
NC13
-
52
NC14
-
53
NC15
-
54
5
MTD981A Revision 1.2 02/19/2001
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