Alinco DX-70, Service Manual

Page: 23 / 116

5) Terminal function of CPU
No. U*e1 ÜM2 U »*3 Pin Nam* Remarks I/O
Description
L H
2 AVss GNO
3 GNO
4 ; X2 XTAL, LOSC
s
X1
XTAL
6 Vss GNO
7
OSC1
XTAL
8 OSC2 XTAL
9 /RES /RST
I
10 MDO SV?
I
11
P20
IR04
ADTRG DCK DIAL CLOCK
‘
Mam dial rolaton detection and pulse
number
Rise edge
Oeteclon
12 P21 UO PCONT POWER ON O
Power control output
Power OFF Power ON
13 P22 PSDET POWER DfTT
'
Condition Oetecuon «when power switch is
turned ON.
Dunng power
OFF
During power QN
,4
P23 TKEY
TUNE KEY
’
Detection of worVing external antenna
tuner
At work Waiting
IS
P24
UNLK PLL UNLOCK
1
PLL unkxx detection
Unloc* Lock
16 P2S MCK EEPROM CK
0
Ctock tor data trans>Tiissio<Vrec©p»ion to
EEPROM
P26 MDAT
EEPROM DATA
I/O
Data Transmission/Reception to
EEPROM
P27
EXT1N
EXT IN
'
External EEPROM transmission
eoce£*ance
EEPROM
Acceptance
19 P30 SCK1 CK1 SER1AL1 CK o
HPL LPLdata tranjimisson ckx*
20 P3i
Sn
DAT1 SERIAL 1 DATA
o HPL. LPLdata transmission
25
P32 SOI ENH HPLL ENABLE o
HPL data transmission enable Enable
22 P33 SCK2 ENL
LPLL ENABLE
o
IP L data transmission enable
Enable
23 P34
SI2
CK2 SERIAL2 CK
0
MODE, BPF, etc. transmits«*' clock
24
P35 S02 DAT2 SERIAL2 DATA o
MODE. BPF. etc. data transmission
2b P36 STR8 ENA SERIAL SELECT
0 MODE. BPF, etc. data enatxe select »on
Enatfe i
?6
P3?
CS
ENB SERIAL SELECT o
MODE, BPF. etc. data enable selection
Enable 2
27
Vss GNO
28 V3
29 V2
30 V1
31
Vcc 5V
32
PA3
COM4 COM4
0 LCD COMMON
33 PA2 COM3 COM4 o
LCD COMMON
34 PA1 COM2
COM3 o LCD COMMON
35 PAO COM1
COM3 o LCD COMMON
36 P50 SEG1 WKP0 DB0 1
SW. initial setting dttection Detection
37 P51 SEG2
WKP1 OB1 1 SW. initial setting defection
Detection
38 P52
SEG3 WKP2 OB?
I
SW, initial setting detection
Detection
39 P53 SEG4 WKP3 DB3 1
SW, initial setting diitection Detection
40
PS4
SEGS WKP4 0B4 1
SW. initial setting diitection Detection
41
P55 SEG6
WKP5 DBS
1
SW. initial setting detection Detection
42 P56 SEG7
WKP6 DB6 1
SW , initial setting defection Detecvon
43 P57 SEG6 WKP7
0
Detection
44
P60 SEG9
Y0 o Panel SW (or ON detection At detecting
45
P€1
SEG10 Y1 o
Pane1 SW for ON detection At detecting
46 P€2 SEG1
Y2 o
Output tor initial condrtton settng
detection
47 P63 SEG12 Y3
o
Output tor initial condition setting
detection
48
P64
SEG13 GND 0
49 P65 SEG14
LCDEN 0 LCO driver enable
50 P66 SEG15
LCDCK 0 LCD driver doc*
51 P67 j SEG18 LCOATA 0
LCD dnver data