![background image](http://html.mh-extra.com/html/icom/ic-2820h/ic-2820h_service-manual_612070054.webp)
M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)
[MAIN UNIT]
REF
ORDER
DESCRIPTION
M.
H/V
NO.
NO.
LOCATION
IC1 1180002371
S.REG
R1111N321B-TR-F
T 13/6.8
IC101 1130010920
S.IC AMBE-2020
B 9.8/9.5
IC102 1130011930
S.IC SN74LVC1G04DCKR
T 4.7/5.1
IC201 1130013440
S.IC SN74LVC2G74DCTR
T 30.3/12.3
IC202 1110005430
S.IC CMX589AD5
B 37/7.5
IC203 1130007021
S.IC TC7S66FU
(TE85L,F)
T 39.6/5.2
IC300 1110005290
S.IC NJM2115V-TE1-#ZZZB
T 28.6/6.3
IC301
1130006921 S.IC
TA75W01FU (TE12L,F)
T
35.7/9.1
IC350 1130011631
S.IC AD73311ARSZ
B 24.3/6.4
IC352 1180002371
S.REG
R1111N321B-TR-F
B 12.9/26.7
IC353 1190002470
S.IC ITRAX130
<MRF>
B 52.2/36.7
IC354 1130013640
S.IC TC74VHCT125AFK
(E,K)
T 2.5/27.2
IC357 1130013570
S.IC SN74LVC1G07DCK
T 18.4/22.7
IC359
1130013570 S.IC
SN74LVC1G07DCK
T
18.9/18.2
IC360 1130013650
S.IC TC74VHC125FK
(EL,K)
T 17.8/28.8
IC361 1180002371
S.REG
R1111N321B-TR-F
T 23.8/20.7
Q1 1510000581
S.TR
2SA1362-GR
(TE85R,F)
T
12/15.7
Q2 1590003390
S.TR
UNR9215J-(TX)
T
8.4/13.2
Q50 1510000581
S.TR
2SA1362-GR
(TE85R,F)
B
3.3/30.7
Q51 1590001170
S.TR
XP1501-(TX)
.AB
B
7.8/30.1
Q100 1530002280
S.TR 2SC4081
T106
S
T 2.2/7.3
Q200 1590003390
S.TR UNR9215J-(TX)
T 39/11.8
Q201 1590003390
S.TR UNR9215J-(TX)
T 35.5/3.9
Q202 1530002280
S.TR 2SC4081
T106
S
T 26.2/12.8
Q218 1520000561
S.TR 2SB1123
T-TD-E
B 8.6/22.5
Q219 1590001170
S.TR XP1501-(TX)
.AB
B 8.1/26.4
Q221 1590003390
S.TR UNR9215J-(TX)
T 6/14.4
Q222 1590003390
S.TR UNR9215J-(TX)
T 5.9/17.4
Q223 1590003390
S.TR UNR9215J-(TX)
T 40.9/10.8
Q224 1590003250
S.TR UNR9115J-(TX)
B 5.2/24.5
D100 1790001240
S.DIO
MA2S728-(TX)
T 8.1/2.1
D102 1790001240
S.DIO
MA2S728-(TX)
T 27.9/20.1
X100
6050012290 S.XTL
CR-820 (16.384 MHz)
T
7.9/8.4
X200
6050012300 S.XTL
CR-821 (9.8304 MHz)
T
21.5/11.8
R1
7030000180 S.RES MCR10EZHJ 22 (220)
T
10.3/12.5
R2
7030005240 S.RES ERJ2GEJ 473 X (47 k)
T
10/5.3
R3
7030005050 S.RES ERJ2GEJ 103 X (10 k)
T
9.9/15.7
R50
7030005040 S.RES ERJ2GEJ 472 X (4.7 k)
B
7.3/28.3
R100
7030005240 S.RES ERJ2GEJ 473 X (47 k)
T
6.3/2.2
R104
7030005120 S.RES ERJ2GEJ 102 X (1 k)
T
7/4.1
R105
7030007280 S.RES ERJ2GEJ 331 X (330 )
T
17.1/6.5
R106
7030004980 S.RES ERJ2GEJ 101 X (100 )
T
2.6/3.5
R107
7030005120 S.RES ERJ2GEJ 102 X (1 k)
T
2.6/5.1
R108
7030005090 S.RES ERJ2GEJ 104 X (100 k)
T
4/7.7
R109
7030004990 S.RES ERJ2GEJ 221 X (220 )
T
1.7/10.3
R202 7030010040
S.RES
ERJ2GEJ-JPW
T 32.8/13.6
R203
7030005240 S.RES ERJ2GEJ 473 X (47 k)
B
34.7/12.8
R204
7030005240 S.RES ERJ2GEJ 473 X (47 k)
B
35.6/13
R205
7030005240 S.RES ERJ2GEJ 473 X (47 k)
B
36.5/13.3
R206
7030005240 S.RES ERJ2GEJ 473 X (47 k)
B
37.4/13.8
R207
7030005240 S.RES ERJ2GEJ 473 X (47 k)
T
39.3/13.3
R208
7030005090 S.RES ERJ2GEJ 104 X (100 k)
B
41.1/13.9
R209
7030005090 S.RES ERJ2GEJ 104 X (100 k)
B
39.9/13.6
R210
7030005220 S.RES ERJ2GEJ 223 X (22 k)
B
31.5/4.1
R211
7030006610 S.RES ERJ2GEJ 394 X (390 k)
T
38.7/3.3
R212
7030005240 S.RES ERJ2GEJ 473 X (47 k)
T
40.1/7.6
R213
7030004980 S.RES ERJ2GEJ 101 X (100 )
T
28.1/12.7
R214
7030005120 S.RES ERJ2GEJ 102 X (1 k)
T
27.8/11.1
R215
7030005090 S.RES ERJ2GEJ 104 X (100 k)
T
26.3/14.6
R216
7030004990 S.RES ERJ2GEJ 221 X (220 )
T
25.6/10.8
R217
7030005050 S.RES ERJ2GEJ 103 X (10 k)
T
39.3/14.2
R300
7030005090 S.RES ERJ2GEJ 104 X (100 k)
T
22.4/5.9
R301
7030005310 S.RES ERJ2GEJ 124 X (120 k)
T
23.9/6.4
R302
7030005090 S.RES ERJ2GEJ 104 X (100 k)
T
23.9/7.6
R303
7030005240 S.RES ERJ2GEJ 473 X (47 k)
T
29.5/2.9
R304
7030005090 S.RES ERJ2GEJ 104 X (100 k)
T
30.3/3.8
R305
7310004610 S.TRI
EVM-2WSX80 B15 (104)
B
31.3/6.7
R306
7030005060 S.RES ERJ2GEJ 333 X (33 k)
T
35.7/5.8
R307
7030005090 S.RES ERJ2GEJ 104 X (100 k)
T
33.6/6.4
R310
7030005530 S.RES ERJ2GEJ 100 X (10 )
T
22.9/3
R350
7030005010 S.RES ERJ2GEJ 681 X (680 )
T
25.3/8.8
R351
7030008400 S.RES ERJ2GEJ 182 X (1.8 k)
T
27.5/8.8
R352
7030005240 S.RES ERJ2GEJ 473 X (47 k)
T
27.9/3.8
R353
7030004980 S.RES ERJ2GEJ 101 X (100 )
B
29.4/5.8
R354
7030005240 S.RES ERJ2GEJ 473 X (47 k)
B
20.6/11.1
R355
7030005220 S.RES ERJ2GEJ 223 X (22 k)
B
15.5/26.3
R357
7030005040 S.RES ERJ2GEJ 472 X (4.7 k)
T
7.5/15.4
R362
7030007280 S.RES ERJ2GEJ 331 X (330 )
T
20.2/20.4
R363
7030007280 S.RES ERJ2GEJ 331 X (330 )
T
21.5/18.1
R365
7030005000 S.RES ERJ2GEJ 471 X (470 )
B
10.4/27.3
R367
7030005040 S.RES ERJ2GEJ 472 X (4.7 k)
T
7.5/17
R373
7030005050 S.RES ERJ2GEJ 103 X (10 k)
T
16.1/24.1
R378
7030008290 S.RES ERJ2GEJ 183 X (18 k)
T
19/24.9
R383
7030005050 S.RES ERJ2GEJ 103 X (10 k)
T
17.5/24.8
R385
7030005050 S.RES ERJ2GEJ 103 X (10 k)
T
17.1/18.3
R386
7030005050 S.RES ERJ2GEJ 103 X (10 k)
T
16.1/20.8
R387
7030008290 S.RES ERJ2GEJ 183 X (18 k)
T
18/20.1
R390
7030005160 S.RES ERJ2GEJ 105 X (1 M)
T
4.1/30.6
R391
7030005160 S.RES ERJ2GEJ 105 X (1 M)
T
4.4/23.8
R392
7030005160 S.RES ERJ2GEJ 105 X (1 M)
T
1.6/22.4
R393
7030005160 S.RES ERJ2GEJ 105 X (1 M)
T
3/32
R394
7030005220 S.RES ERJ2GEJ 223 X (22 k)
T
22.9/23.7
R396
7030004980 S.RES ERJ2GEJ 101 X (100 )
T
24.6/22.8
C1 4550007680
S.TAN
TEESVP
0J
226M8R
T
11.9/9.7
C2 4550007600
S.TAN
F920J106MPABMA
T
12.7/11.4
C3 4030016930
S.CER
ECJ0EB1A104K
T
13.4/12.8
C50 4030017460
S.CER
ECJ0EB1E102K
B
13.1/29
S.=Surface mount
[MAIN UNIT]
REF
ORDER
DESCRIPTION
M.
H/V
NO.
NO.
LOCATION
C51 4030017460
S.CER
ECJ0EB1E102K
B
4.2/26.4
C52 4550006930
S.TAN
TEESVP
0J
225M8R
B
1.8/27.8
C53 4030017460
S.CER
ECJ0EB1E102K
B
3.2/28.3
C54 4030017460
S.CER
ECJ0EB1E102K
B
4.3/27.6
C100 4030016930
S.CER
ECJ0EB1A104K
B 14.8/19.2
C101 4030016930
S.CER
ECJ0EB1A104K
B 5.9/19
C102 4030016930
S.CER
ECJ0EB1A104K
T 5/8.8
C103 4030016930
S.CER
ECJ0EB1A104K
T 4/11.8
C104 4030016930
S.CER
ECJ0EB1A104K
T 3.4/2.2
C106 4030016930
S.CER
ECJ0EB1A104K
T 16.7/10.2
C107 4030016930
S.CER
ECJ0EB1A104K
T 17.6/10.2
C108 4030016930
S.CER
ECJ0EB1A104K
T 16.8/5
C109 4030016930
S.CER
ECJ0EB1A104K
T 12.1/2.8
C110 4030017420
S.CER
ECJ0EC1H470J
T 10.1/2
C111 4030017460
S.CER
ECJ0EB1E102K
T 5.6/10
C112 4030016930
S.CER
ECJ0EB1A104K
T 1.7/5.1
C113 4030016930
S.CER
ECJ0EB1A104K
T 1.7/9.4
C114 4030016930
S.CER
ECJ0EB1A104K
T 8.5/5.8
C116 4030016930
S.CER
ECJ0EB1A104K
T 5.1/2.7
C117 4030017460
S.CER
ECJ0EB1E102K
T 2.9/9.6
C200 4030017460
S.CER
ECJ0EB1E102K
T 22/14.1
C201 4030016930
S.CER
ECJ0EB1A104K
T 26.5/10.8
C202 4030016930
S.CER
ECJ0EB1A104K
T 24.7/10.8
C203 4030016930
S.CER
ECJ0EB1A104K
T 18.5/13.8
C204 4030017460
S.CER
ECJ0EB1E102K
T 32.5/12.4
C205 4030016930
S.CER
ECJ0EB1A104K
B 38.2/1.5
C206 4030017030
S.CER
ECJ0EB1A273K
B 39.1/1.5
C207 4030017030
S.CER
ECJ0EB1A273K
B 40/1.5
C208 4030016930
S.CER
ECJ0EB1A104K
B 33.1/2.1
C209 4030017400
S.CER
ECJ0EC1H220J
B 40.1/12.7
C210 4030018860
S.CER
ECJ0EB0J105K
B 38.7/12.8
C211 4030017460
S.CER
ECJ0EB1E102K
T 40.5/14.6
C212 4030017760
S.CER
ECJ0EB1H222K
B 31.1/2.9
C213 4030016930
S.CER
ECJ0EB1A104K
T 39.5/8.5
C214 4030017460
S.CER
ECJ0EB1E102K
T 33.9/3.9
C216 4030017460
S.CER
ECJ0EB1E102K
T 24.7/14.6
C300 4030016930
S.CER
ECJ0EB1A104K
T 25.2/4.4
C301 4030018860
S.CER
ECJ0EB0J105K
T 22.4/4.3
C302 4030016930
S.CER
ECJ0EB1A104K
T 27.9/2.9
C303 4030016930
S.CER
ECJ0EB1A104K
T 38.2/9.8
C304
4030017490 S.CER C1608 JB 1A 105K-T
T
32.7/9.6
C310 4550007730
S.TAN
TEESVJ
0J
106M8R
T 24.9/2.1
C350 4030016930
S.CER
ECJ0EB1A104K
T 23.5/8.8
C351 4030016970
S.CER
ECJ0EB1C223K
T 24.4/8.8
C352 4030016950
S.CER
ECJ0EB1A473K
B 29.4/7.4
C353 4030016930
S.CER
ECJ0EB1A104K
B 30.2/3.1
C354 4030016930
S.CER
ECJ0EB1A104K
B 29.3/3.1
C355 4030017420
S.CER
ECJ0EC1H470J
T 18.2/8.8
C356 4550006930
S.TAN
TEESVP
0J
225M8R
B 23.9/11.1
C357 4030016930
S.CER
ECJ0EB1A104K
B 22/12.8
C358 4030016930
S.CER
ECJ0EB1A104K
B 20.6/12
C360 4030017460
S.CER
ECJ0EB1E102K
B 27.8/2.2
C361
4550007090 S.TAN TEESVA 1A 226M8R
B
15.8/29.3
C362 4550007600
S.TAN
F920J106MPABMA
B 10.1/30.3
C363 4030016790
S.CER
ECJ0EB1C103K
B 59.8/46.7
C364 4030016790
S.CER
ECJ0EB1C103K
B 10.4/25.6
C366 4030016790
S.CER
ECJ0EB1C103K
T 20.5/23.7
C367 4030016790
S.CER
ECJ0EB1C103K
T 1.3/32.1
C368 4030016790
S.CER
ECJ0EB1C103K
T 17.4/21
C369 4030016790
S.CER
ECJ0EB1C103K
T 20.6/27.4
C370 4030016790
S.CER
ECJ0EB1C103K
B 13.7/30
C371 4550006930
S.TAN
TEESVP
0J
225M8R
B 56.9/16.2
C372 4030016790
S.CER
ECJ0EB1C103K
T 18.8/14.8
C374 4550007600
S.TAN
F920J106MPABMA
T 27.1/22.8
C375 4550007600
S.TAN
F920J106MPABMA
T 26.4/20.3
C376 4030016790
S.CER
ECJ0EB1C103K
T 24.8/24
C377 4030016790
S.CER
ECJ0EB1C103K
T 24.5/18.5
C378 4030017460
S.CER
ECJ0EB1E102K
T 29.7/17.3
J1 6510018440
S.CNR
AXN430C330P
T
10.5/25.7
J1 6510025790
S.CNR
AXN430C030S
T
10.5/25.7
EP1 6910018460
S.BEA
MMZ1005Y102C-T
T
14.6/9.7
EP100 6910018460
S.BEA MMZ1005Y102C-T
T 8.5/4.9
EP200 6910018460
S.BEA MMZ1005Y102C-T
T 20.1/13.8
EP201 6910018460
S.BEA MMZ1005Y102C-T
T 27.9/14.6
EP202 6910018460
S.BEA MMZ1005Y102C-T
T 37.1/4.4
EP203 6910018460
S.BEA MMZ1005Y102C-T
T 38.5/7.6
EP300 6910018460
S.BEA MMZ1005Y102C-T
T 24.1/3.4
EP350 6910018460
S.BEA MMZ1005Y102C-T
T 28.9/1.9
EP351 6910018460
S.BEA MMZ1005Y102C-T
B 21.8/11.6
EP352 6910018460
S.BEA MMZ1005Y102C-T
T 17.1/7.7
EP353 6910014690
S.BEA MPZ1608S221A-T
T 20.9/15.5
EP355 6910014690
S.BEA MPZ1608S221A-T
B 12.5/23
• PARTS LIST
12 - 1
SECTION 12
UT-123 (Optional product)
• VOLTAGE DIAGRAM
C104
IC101
1
GND
2
NC
3
NC
4
NC
5
NC
6
NC
7
NC
8
VDD
9
GND
10
GND
1
1
VD
D
12
VDD
13
NC
14
NC
15
NC
16
NC
1
7
N
C
18
NC
19
NC
20
EPR
21
NC
22
NC
23
VD
D
24
ENCODER_EN
25
GND
6
2
D
N
G
7
2
K
L
C
_
X
R
_
C
E
D
O
C
8
2
K
L
C
_
X
R
_
N
A
H
C
9
2
B
R
T
S
_
X
R
_
C
E
D
O
C
0
3
B
R
T
S
_
X
R
_
N
A
H
C
1
3
A
T
A
D
_
X
R
_
C
E
D
O
C
2
3
A
T
A
D
_
X
R
_
N
A
H
C
3
3
K
L
C
_
X
T
_
C
E
D
O
C
4
3
K
L
C
_
X
T
_
N
A
H
C
5
3
D
N
G
6
3
D
D
V
7
3
B
R
T
S
_
X
T
_
C
E
D
O
C
8
3
B
R
T
S
_
X
T
_
N
A
H
C
9
3
D
D
V
0
4
D
N
G
1
4
A
T
A
D
_
X
T
_
C
E
D
O
C
2
4
A
T
A
D
_
X
T
_
N
A
H
C
3
4
C
N
4
4
D
D
V
5
4
D
D
V
6
4
D
D
V
7
4
D
D
V
8
4
D
D
V
9
4
D
D
V
0
5
D
N
G
51
CLOCK_MODE
52
GND
53
GND
54
VDD
55
NC
56
GND
57
VDD
58
NC
59
NC
6
0
NC
61
N
C
62
NC
63
GND
64
VDD
65
GND
6
6
NC
67
X1
68
X2/CLKIN
69
RESETN
70
RATE_SE
L0
71
RATE_SE
L1
7
2
RATE_SE
L2
73
RATE_SEL
3
74
RATE_SEL4
75
CHANN_SEL
0
6
7
D
D
V
7
7
1
L
E
S
_
N
N
A
H
C
8
7
C
N
9
7
N
E
_
T
F
O
S
0
8
0
L
E
S
_
D
U
A
B
1
8
1
L
E
S
_
D
U
A
B
2
8
N
E
_
P
I
L
S
3
8
N
E
_
P
E
E
L
S
4
8
0
E
L
S
_
C
E
D
O
C
5
8
1
L
E
S
_
C
E
D
O
C
6
8
N
E
_
D
A
V
7
8
D
D
V
8
8
D
N
G
9
8
D
N
G
0
9
D
D
V
1
9
C
N
2
9
C
N
3
9
C
N
4
9
C
N
5
9
C
N
6
9
C
N
7
9
C
N
8
9
C
N
9
9
C
N
0
0
1
C
N
IC361
1
VDD
2
GND
3
CE
4
NC
5
VOUT
C212
IC1
1
VDD
2
GND
3
CE
4
NC
5
VOUT
C213
C203
C304
C350
3
6
3
C
IC350
1
VOUTP
2
VOUTN
3
AVDD1
4
AGND1
5
VINP
6
VINN
7
REFOUT
8
REFCAP
9
AVDD2
10
AGND2
11
DGND
12
DVDD
13
RESET
14
SCLK
15
MCLK
16
SDO
17
SDOFS
18
SDIFS
19
SDI
20
SE
2
7
3
C
R300
Q100
R390
R350
R354
IC203
1
2
3
4
5
R216
CP2
R208
1
6
3
C
EP351
7
8
3
R
EP353
9
6
3
C
C214
R50
C204
D102
C2
R373
C200
R306
C51
Q201
D100
C360
R108
C107
C110
C210
Q2
IC357
1
NC
2
A
3
GND
4
Y
5
VCC
R351
C1
R210
R392
C208
C216
EP1
R304
EP352
CP201
C106
0
7
3
C
R100
8
7
3
R
Q218
C206
C108
4
7
3
C
Q221
IC201
1
CLK
2
D
3
Q
4
GND
5
Q
6
CLR
7
PRE
8
VCC
R353
4
6
3
C
R393
Q50
C209
R104
J1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
R217
R109
IC352
1
VDD
2
GND
3
CE
4
NC
5
VOUT
R352
C113
CP1
R209
C303
C356
R3
R2
C202
EP203
Q200
1
0
3
C
I
1
2
3
4
5
6
7
8
C353
7
6
3
C
8
7
3
C
C201
C100
C102
5
7
3
C
X100
1
GND
2
GND
3
OUT
4
VC
C
5
5
3
R
R207
CP202
C358
C109
IC359
1
NC
2
A
3
GND
4
Y
5
VCC
R391
Q219
1
2
4
3
5
R1
C351
C116
Q1
7
6
3
R
R305
6
6
3
C
C52
R106
C53
C101
R213
R307
R212
EP100
R362
R215
7
7
3
C
C310
C301
C357
R206
R205
3
8
3
R
IC360
1
1G
2
1A
3
1Y
4
2G
5
2A
6
2Y
7
GND
8
3Y
9
3A
10
3G
11
4Y
12
4A
13
4G
14
VCC
IC300
1
2
3
4
5
6
7
8
R310
Q222
C103
EP355
IC353
1
EPORT4
2
BOOT1/EPORT2
3
EPORT5
4
EPORT7
5
GND
6
EPORT6
7
EPORT3
8
AD0
9
XRESET
10
BOOT2/EXROMI
11
GND
12
EPORT9
13
EPORT12
14
VDD_BACKUP
17
TX0
18
RX0
19
EPORT11/RX1
20
GND
21
ADREFT
22
GND
23
GND
24
RF
25
GND
26
GND
27
EPORT8
28
VDD
29
EPORT1
30
1PPS
15
AD1
16
EPORT10/TX1
R204
C354
EP202
C117
C300
J2
C50
Q202
C302
R363
IC202
1
XTAL
2
XTAL/CLK_RX
3
CLKDIVA
4
CLKDIVB
5
RX_HOLD
6
RXDCACQ
7
PLLACQ
8
RX_PSAVE
9
VBIAS
10
RXFB
11
RX_SIG_IN
12
VSS
13
DOC2
14
DOC1
15
BT
16
TXO
17
TXE
18
TXP
19
TXD
20
RXD
21
RXC
22
TXC
23
S/N
24
VDD
IC102
1
NC
2
A
3
GND
4
Y
5
VCC
R301
EP300
R214
R105
6
7
3
C
5
6
3
R
1
1
1
C
R202
5
8
3
R
C207
2
6
3
C
Q224
C352
4
9
3
R
R211
X200
1
GND
2
GND
3
OUT
4
VCC
R203
R107
CP203
C114
R302
R303
EP201
C205
EP200
7
5
3
R
Q51
1
2
34
5
1
7
3
C
C211
Q223
EP350
R396
IC354
1
1G
2
1A
3
1Y
4
2G
5
2A
6
2Y
7
GND
8
3Y
9
3A
10
3G
11
4Y
12
4A
13
4G
14
VCC
C112
C54
R386
C3
8
6
3
C
K
L
C
E
B
M
A
I
S
DCEL
O
S
SCLKSCLK
SI
R
P
E
E
B
M
A
D
X
R
E
B
M
A
AMBERES
D
X
T
E
B
M
A
TXDT
AMBERES
TXCK
K
L
C
S
SENSEN
B
T
S
E
B
M
A
SO
N
E
S
AMB_EPR
AMB_STB
AMB_RES
AMB_CLK
AMODIN
RXDT
SIGN201
DAFOUT
BTONE
D
N
G
A
AGND
AGND
RXCK
DMOD
0
D
X
R
S
P
G
AMB_RES
C5V
T
O
O
B
S
P
G
GPSRESET
GPSRESET
GPSBOOT
ACQ
AMBERES
AMBEEPR
AMB_EPR
AMB_RXD
DVC
ACQ
DCEL
T
D
X
T
_
D
D_TXDT
0
D
X
T
G
0
D
X
T
S
P
G
0
D
X
R
G
GPSRXD0
GPSTXD0
V
5
AMB_CLK
AMBECLK
AMB_TXD
D
X
T
_
B
M
A
DVC
D_TXCK
D_RXCK
D_RXDT
D_TXDT
TXDT
AMB_STB
AMBETXD
AMB_TXD
AMBESTB
RXDT
RXCK
AMBERXD
TXCK
CPU5V
13PIN OPT1
VIH=Vdd+0.3V
AMBE2020
RX
DV:1.3V
FM:0V
DV:0.4V
FM:0V
RX
DV:4.7V
FM:0.5V
RX
FM:0V
DV:1.4V
RX
RX
C:3.3V
RX
C:3.2V
C:4.8V
RX
RX
C:4.5V
DV:3.3V
FM:0V
RX
DV:3.2V
FM:0V
RX
RX
p-p
3.3V
E2820̲A3format.indd 28-29
2007/04/13 17:30:03