TS-440S
1 8
CIRCU IT D ESCRI PTION
pulses and U/D signals from two clock signals which are 90°
out of phase with each other, and sends the pulses and sig
nals to the 7 800. A clock pulse interru pts the 7800 and a
U/D signal causes the 7800 to perform a count u p or down
operation for each step . If fast rotation occu rs, the 7800
processes several steps of PLL d ata at one time .
Voltages from the R IT and IF shift VRs a re converted from
a n alog to digital by the AID convertor IC (40 52) and fed into
the 7800. The voltages are used to d rive the display and are
reflected in the PLL d ata .
The digital control circuit contains two 8 2 5 5 ' s for extended
1/0 . The 8 2 5 5 in control u nit A is a n outputonly element and
the 8 2 5 5 in control u nit B is a n inputonly element for key
scan and static data . The output 8 2 5 5 emits VS- 1 signals,
Wave-form
disposltloo
401 1 , 4030
Mappil'!Q conrrol
S N 7 4 L S l 38
Mode informolion(:l(·LEDJ
@
A ID contro l
®
CLSB,USB, CW, AM, FM, FSKI
CClocl!, port , select J
Serial ou1pu1
@
PLL data for the 6 1 4 7, clock sig na ls, and 1 MHz LED data .
The input 8 2 5 5 receives key scan data such as panel switch
d ata and DIP switch data for CAR compensation . It also
receives static data which cannot be entered as a portion key
scan data .
The 7800 outputs four bits of band and mode information
( 1 1 bands in the freq uency range from 30 kHz to 30 MHz) .
Each time the 8 2 5 1 , used as the interface to a personal com
puter, receives one byte of data, the 7800 is interru pted and
reads the data from the 8 2 5 1 . The 7800 analyzes any com
mand in the data . In response to the command, the 7800
controls setting or w rites data to the 8 2 5 1 as required . The
8 2 5 1 serially sends one byte of data including a start bit, syn
chronizing to a 4800 Hz clock sig n a l .
FILTER
U N I T
.•
.•
Eneoder counT pulse
Encodt1r UIO si9001
Unl ock s i g n a l
TX control < R L l
Bun
er
Sand I n forma t ion
@)
E.no b l e
g)
(��:�,:;r';a,
F 1 P : 6300
)
R O M
1 6 K
2 7 1 2 8
A / 0 converter data
Y S - I
A / O converter CS
! A ddress s1or t l
Tone conlro l ( TON)
AF M u te C M T I
L E O
R F M u a ( S 8 K l
I M . SCR, I MHz
PLL d o t o
Lock l
!Doto, address 8 doto)
O P T I O N
v s - '
f PLL : 1 4 5 1 58, F I P : 63001
� r i pherol resel
!8255 C A J , ! B l, 8250
F I P
@
Power down C P O
l
8 B I T BUS
L I N E
L o c k S W
AT S W
M I C UP/DOWN SW
PTT SW
vs - 1
Busy
K@y scan
(
• O " '
;
M �v, SCAN, CLEAR
VIM, M.IN. ENT
R I T , X I T , T - FSET
A I B , SPRIT, A = B
t
M H l , UP, DOWN
V O I C E
gf�
5C� l i brofion
- - - - - ....,
I
I
L E VEL
8 2 5 1
C O N V E R T E R
I
L -
- - - - ....2P.!..!2 N_
- - - - - - - J
R S - 2 3 2 C
Fig . 1 3 Control circuit block d iagram
c o m p u t e r
