Kenwood TS-830S Service Manual page 44

The frequency dlsplay resolution
I S
ldentlcal to that of the
maln unit
(down to 1 0 0 Hz)
except for the
RIT and CW
transmission frequency dlsplay Thls
I S
accomplished by dy-
namically drivlng the fluorescent dlsplay tube based on the
display and column data furnished by
the
microprocessor
The power to the V F O - 2 3 0
I S
interlocked wlth
that
of the
main unit. If, however, the V F O - 2 3 0
IS
plugged
I n t o
an AC
outlet, the display, memory and output of the VFO remaln l ~ v e
even when the power switch on the
m a l n
unit
IS
OFF
Therefore, when the main unit is agaln powered-on, the
operating state set prior to power-off will reappear Back-up
power consumption for the V F O - 2 3 0
I S
approximately
1 0 mA
Fig. 11 Ceramic filter (L71-0321-05) CFW470C
I t e m
C e n t e r f r e q u e n c y
6
d B b a n d w ~ d t h
50
d B b a n d w ~ d t h
R ~ p p l e ( w ~ t h ~ n
4 5 5 + 8 kHz)
L o s s
G u a r a n t e e d
attenuation
I n p u t a n d o u t p u t ~ m p e d a n c e
. .
at 5 V
(DIGITAL UNIT, CF 1 )
R a t i n g
470
kHz
!
1 2
5 kHz
o r m o r e
-1-25
kHz
o r l e s s
3
d B
or
l e s s
4
d B o r l e s s
35
d B
or
l e s s
w i t h ~ n 4 5 5 % 1 0 0
kHz
1 5 kil
TO
XTAL 1
XTAL 2
RESET
33
INT
E A
PSEN
WR
ALE
DBo
DBi
D B Z
DB3
DB4
D m
D m
DBt
[OV)Vww
C U L L C L O a
Maximum rating (Ta - 2 5 ° C )
Vcc(+SV)
Terminals
T 1
P 1 0 - P 1 7 I n p u t a n d o u t p u t p o r t ( P O R T 1 )
P27
P 2 0 - P 2 7 I n p u t a n d o u t p u t p o r t ( P O R T 2 )
P26 DBo-DBI
D a t a b u s
P25
T O . T I T e s t
P24
-
PI7
I N T
-
I n t e r r u p t
P16
R D R e a d
PIS
WR
W r i t e
P14
A L E
-
A d d r e s s l a t c h e n a b l e
P13
P S E N
P r o g r a m s t o r e e n a b l e
P12
R E S E T R e s e t
Pl
1
3'3
S i n g l e s t e p
P10
E
A
E x t e r n a l a c c e s s
Vm(+SV)
X T A L
1. 2
C r y s t a l I n p u t
PROG
P23
P22
P21
P20
Fig. 1 3 pPD8048C-155 (DIGITAL UNIT, IC11)
EXPANSION TO
~~~&~~~
EXPANDER
PORT 1/0
Item
Operating voltage
lnput voltage
Output voltage
Operating temperature
Storage temperature
RESIDENT
ROM
!Ka8
DECODE
PORT 2 LATCH HIGH PROGRAM
( H I G H ~ I COUNTER
3
(4
PORT 0
BUS BUFFER
I
PORT 0 LATCH
A
AND LOW
PC TEMP REG
-
: ; E 0-
4 8 0
- -
'
TIMER/EVENT LOWER PROGRAM
COUNTER
PROGRAM STATUS
TEST
1
-
( 8 )
COUNTER
(8)
WORD
PORT I
BUS
t
RAM ADDRESS
ACCUMULATOR TEMP REC (8) FLAGS
( 8 )
Symbol
Vcc
VOO
Vi
Vo
Topt
Tstg
INSTRUCTION
REGISTER
AND DECOOER
-
TEST 0
-TEST
I
-
INT
Rating
- 0 . 5 - +7.OV
- 0 . 5 - + 7 . 0 V
- 0 . 5 - + 7 . 0 V
- 0 . 5 -
+
7.OV
0 -
+
70°C
- 6 5 -
+
1 5 0 ° c
REGISTER 0
REGISTER
1
REGISTER 2
REGISTER 3
REGISTER 4
REGISTER
5
REGISTER 6
-
F L A G 0
CONDITIONAL
-
FLAG
'
BRANCH
-
TIMER FLAG
LOGIC
C -
CARRY
-
ACC
CONTROL AND TIMING ACC BIT TEST
INT RESET PROG E A XTAL1 X T A L 2 ALE PSEN
SS
REGISTER 7
8LEVEL STACK
(VARIABLE LENGTH)
OPTIONAL SECOND
REGISTER BANK
DATA STORE
I
t 1
I
RESIDENT
IMTCRRUPT I I T I A L I Z L PROM/ C W / O8CILLATOR A D D I I L U M O O R A Y *INOLE W A D WMTL
RAM ARRAY
L X P I I D L R Y W O * XTAL LATCH Y C Y O I I 81- 8 l R O I C I
6 4 x 8
8-
I R M A T L 8T- C N A U L