XK-3
00228-24286
MGH-91A
XK-3
A0
12
A1
11
A2
10
A3
9
A4
8
A5
7
A6
6
A7
5
A8
27
A9
26
A10
23
A11
25
A12
4
A13
28
A14
29
D0
13
D1
14
D2
15
D3
17
D4
18
D5
19
D6
20
D7
21
CE
22
OE
24
Vcc
32
GND
16
A15
3
A16
2
A17
30
A18/PRG
31
Vpp
1
U55
AK0
AK1
AK2
AK3
AK4
AK5
AK6
AK7
AK8
AK9
AK10
AK11
AK12
AK13
AK14
AK15
AK16
AK17
AK0
AK1
AK2
AK3
AK4
AK5
AK6
AK7
AK8
AK9
AK10
AK11
AK12
AK13
AK14
AK15
AK16
DK0
DK1
DK2
DK3
DK4
DK5
DK6
DK7
+5V
+5V
C30
0.01u
C27
0.1u
+5V
DK8
DK9
DK10
DK11
DK12
DK13
DK14
DK15
DK8
DK9
DK10
DK11
DK12
DK13
DK14
DK15
AK18
TEST 11
TEST12
for Debugger
JP2
JP3
JP4
+5V
C91
0.01u
C229
0.01u
AK17
AK18
27SF010-70
RXD1
KEYSCAN SYSTEM ROM
C230
15pF
C231
15pF
X5
20MHz
for Boot ModeSet
TXD1
U3 CS0
U3 RD
U3 HWR
U3 RD
U3 CS0
U3 CS1
KEYSCAN RESET
KEY RESET/
U3 RD
U3 HWR
R124
10K
U3 CS1
+5V
U3 MD1
+5V
TxDU3
RxDU3
U3 MD1
RESET
GND
R189
10K
+5V
R190
10K
+5V
U3 MD1
1
2
U8A
74LV04APW
KEY IREQ
KD1
KD2
KD3
KD4
KD5
KD6
KD7
KD0
KD[0.. 7]
KD[0.. 7]
KEY RESET/
1
2
3
4
5
6
7
J119
B7B-PH
BOOT CONECT NOT USE
A0
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
E
19
DIR
1
Vcc
20
GND
10
U21
74LV245APW
+5V
KEYBOARD HI
FL1
FL2
FL3
FL4
FL5
FL6
FL7
FL8
R191
3.3k
R192
3.3k
R193
3.3k
R194
3.3k
R195
3.3k
R196
3.3k
R197
3.3k
R198
3.3k
+5V
U3 CS1
U3 HWR
U3 HWR
KEYBOARD LOW
A0
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
E
19
DIR
1
Vcc
20
GND
10
U22
74LV245APW
C81
0.1u
R199
3.3k
R201
3.3k
R202
3.3k
R203
3.3k
R204
3.3k
R205
3.3k
R206
3.3k
R207
3.3k
+5V
+5V
FL9
FL10
FL11
FL12
FL13
FL14
FL15
FL16
U3 CS1
U3 CS1
U3 HWR
U3 HWR
AK[1.. 11]
A
1
B
2
C
3
E1
4
E2
5
E3
6
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
Vcc
16
GND
8
U20
74LV138APW
AK4
AK1
AK2
AK3
+5V
C85
0.1u
U3 CS1
U3 CS1
AK[1..11]
AK[1..11]
A
1
B
2
C
3
E1
4
E2
5
E3
6
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
Vcc
16
GND
8
U18
74LV138APW
AK4
AK1
AK2
AK3
+5V
C90
0.1u
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
J111
XG4A-2031
FL53
FL58
FL59
FL60
FL61
FL62
FL63
FL54
FL55
FL56
FL57
DK0
DK1
DK2
DK3
DK4
DK5
DK6
DK7
DK8
DK9
DK10
DK11
DK12
DK13
DK14
DK15
KSELF4
KSELS4
KSELF5
KSELS5
KSELF4
KSELS4
KSELF5
KSELS5
KEYSCAN_CE
KEYSCAN_CE
AK[1.. 11]
GND
+5V
U3 FWE
R185
100
R121
100
U3 FWE
U3 FWE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
J110
XG4A-1631
C80
0.1u
C232
0.1u
A0
36
A1
37
A2
38
A3
39
A4
40
A5
41
A6
42
A7
43
A8
45
A9
46
A10
47
A11
48
A12
49
A13
50
A14
51
A15
52
NMI
64
STBY
62
CLKOUT
61
Vss
11
RD
70
HWR
71
RESET
63
XTAL
67
EXTAL
66
P70/AN0
78
P71/AN1
79
P72/AN2
80
P73/AN3
81
P74/AN4
82
P75/AN5
83
P76/AN6
84
P77/AN7
85
A16
53
A17
54
A18
55
A19
56
PA7/TIOCB2/A20/TP7
100
LWR
72
MD0
73
MD1
74
MD2
75
D0
18
D1
19
D2
20
D3
21
D4
23
D5
24
D6
25
D7
26
D8
27
D9
28
D10
29
D11
30
D12
31
D13
32
D14
33
D15
34
PA1/TEND1/TCLKB/TP1
94
PA2/TIOCA0/TCLKC/TP2
95
PA3/TIOCB0/TCLKD/TP3
96
PA4/TIOCA1/A23/TP4
97
PA5/TIOCB1/A22/TP5
98
PA6/TIOCA2/A21/TP6
99
PB0/TMO0/CS7
2
PB1/DREQ0/CS6
3
PB2/TMO2/CS5
4
PB3/DREQ1/CS4
5
PB4/UCAS
6
PB5/LCAS
7
PB6/TxD2
8
PB7/RxD2
9
P80/IREQ0
87
P81/CS3/IREQ1
88
P82/CS2/IREQ2
89
P83/CS1/IREQ3/ADTRG
90
P84/CS0
91
PA0/TEND0/TCLKA/TP0
93
P60/WAIT
58
P61/BREQ
59
P62/BACK
60
RESET OUT
10
AS
69
P94/IREQ4/SCK0
16
P95/IREQ5/SCK1
17
P90/TXD0
12
P91/TXD1
13
P92/RXD0
14
P93/RXD1
15
Vss
22
Vss
44
Vss
57
Vss
65
Vss
92
Vcc
1
Vcc
35
Vcc
68
AVcc
76
AVss
86
Vref
77
U3
H8/3007
+5V
TXDU3
RXDU3
OD PASS
OD PASS
OD PASS
HFATT
1
2
3
4
5
6
7
8
9
J120
B9B-PH
LFATT
HFATT
LFATT
LFATT
HFATT
DASEL1
C234
0.1u
R187
100
R186
100
C237
0.1u
R213
680
3
2
1
U60A
NJM084
C238
0.1u
R216
680
5
6
7
U60B
NJM084
C240
0.1u
R217
680
10
9
8
U60C
NJM084
C241
0.1u
R218
680
12
13
14
U60D
NJM084
+5V
4
11
U60E
NJM084
C235
0.1u
C236
0.1u
+14V
-14V
HF IN-V
LF IN-V
LF OUT-V
HF OUT-V
+14V
5.00V
RA11
4-100
RA20
4-100
A
10
INH
6
X
13
X1
14
X2
15
X0
12
X3
11
Y3
4
VDD
16
Y0
1
Y2
2
GND
8
VEE
7
Y
3
B
9
Y1
5
U59
74LV4052APW
Vout
6
NC
7
Vin
2
GND
4
Trim
5
NC
1
Temp
3
NC
8
U61
REF02BU
C243
0.1u
2012SIZE
2012SIZE
2012SIZE
2012SIZE
2
1
COM
3
D12
1SS181
2
1
COM
3
D13
1SS181
FL52
FL65
FL64
7-8
