TK-90
47
Pin No. Port Name I/O
Function
90
S3
I
Front panel key (
)
91
S2
I
Front panel key ( )
92
S1
I
Front panel key ( )
93
NC
O
NC
94
AVSS
I
GND
95
NC
O
NC
96
VREF
I
AD converter reference power source
97
AVCC
I
Power source input (Analog)
98~100
NC
O
NC
4. DDS: AD9835BRUZ (TX-RX unit IC701,702)
4-1. Block Diagram /
IOUT
COMP
REFIN
FS ADJUST
REFOUT
AGND
AVDD
DGND
DVDD
MCLK
PSEL0 PSEL1
12
S
ON-BOARD
REFERENCE
10-BIT
DAC
PHASE0 REG
PHASE1 REG
PHASE2 REG
PHASE3 REG
FULL-SCALE
CONTROL
COS
ROM
PHASE
ACCUMULATOR
(32 BIT)
MUX
FREQ0 REG
FREQ1 REG
MUX
16-BIT DATA REGISTER
SYNC
FSELECT
FSELECT
BIT
SELSRC
SYNC
8 LSBs
8 MSBs
DECODE LOGIC
FSYNC
SCLK
SDATA
SERIAL REGISTER
CONTROL REGISTER
FSELECT/PSEL REGISTER
DEFER REGISTER
SYNC
SYNC
SELSRC
PSEL0
BIT
PSEL1
BIT
5. FSK Tone Decoder /
cph
!"
: NJM2211M (TX-RX unit IC865)
5-1. Terminal Connection /
!
5-2. Block Diagram /
SEMICONDUCTOR DATA /
!"
!
L
VM
pP
!"
=E
F
VN
pO
!"
=E
F
VO
pN
!"
=E
F
VP
k`
VQ
^spp
dka
VR
k`
VS
sobc
!"#$%&
VT
^s``
!
=E
F
VUúNMM
k`
VCO
14
13
12
11
10
9
8
1
2
3
4
5
6
7
Loop
øDet
Quad
øDet
Signal
Preamp
Internal
Reference
Lock
Detector
Comparator
FSK
Comparator
–
+
– +
Timing
Capacitor
Timing
Resistor
Data
Output
Detector
Output
Loop
øDet
Output
Ref
Voltage
Output
FSK
Comp
Input
NC
V+
Input
Lick
Detector
Filter
GND
Q
Q
ø-DET
VCO
Loop
Filter
Data
Filter
ø
ø
ø-DET
Lock
Detect
Filter
Lock
Detect
Comp
Preamp
FSK
Input
FSK
Output
Lock
Detect
Output
