Kenwood TS-2000 Service Manual page 48

TS-2000/X
DDS : AD9835 (TX-RX 1 unit IC601~603,
TX-RX 2 unit IC406~408)
Block diagram
DVDD DGND
4 5
6
MCLK
FSELECT
BIT
FSELECT 10
FREQ0 REG
MUX
FREQ1 REG
PHASE0 REG
PHASE1 REG
SYNC
PHASE2 REG
PHASE3 REG
16-bit Data Register
8 MSBs 8 LSBs
Decode Logic
Serial Register
9 7 8
FSYNC SCLK SDATA
Pin function
No. Symbol
Analog signal and reference
1 FS ADJUST Full-scale adjust control.
2 REFIN Voltage reference input.
3 REFOUT Voltage reference output.
14 IOUT Current output.
16 COMP Compensation pin.
Power supply
4 DVDD Positive power supply for the digital
section.
5 DGND Digital ground.
13 AGND Analog ground.
15 AVDD Positive power suply fot the analog
section.
Digital interface and control
6 MCLK Digital clock input.
7 SCLK Serial clock, logic input.
8 SDATA Serial data in, logic input.
9 FSYNC Data synchronization signal, logic input.
10 FSELECT Frequency select input.
11 PSEL0 Phase select input.
12 PSEL1
48
SEMICONDUCTOR DATA
AVDD AGND REFOUT FS ADJUST REFIN
15 13 3 1 2
SELSRC
ON-Board Full-Scale
Reference
Control
SYNC
12
Phase
COS 10-bit
∑
Accumulator
ROM DAC
(32 bit)
MUX
SYNC
SYNC
Defer
Register
SELSRC
PSEL0 PSEL1
Control Register
BIT BIT
FSELECT/PSEL
Register
11 12
PSEL0 PSEL1
Function
DAC : M62363FP (TX-RX 1 unit IC14)
Block diagram
8
DI
7
CLK
16 COMP
14 IOUT
RESET 19
VDD 5
20
GND VIN1
Pin function
No. Symbol
8 DI
17 DO
7 CLK
6 LD
19 RESET
2 VOUT1
3 VOUT2
10 VOUT3
11 VOUT4
14 VOUT5
15 VOUT6
22 VOUT7
23 VOUT8
5 VDD
20 GND
1 VIN1
4 VIN2
9 VIN3
12 VIN4
13 VIN5
16 VIN6
21 VIN7
24 VIN8
18 VDAref
12-bit shift register
Address
decoder
8-bit latch 8-bit latch
D-A D-A
converter converter
1 2 24 23
VOUT1 VIN8 VOUT8
Function
Serial data input terminal.
Serial data output terminal.
Serial clock input terminal.
LD terminal input high level then latch circuit
data load.
Reset terminal.
8-bit resolution D-A output.
Power supply terminal.
GND terminal.
D-A converter input terminal.
D-A converter reference voltage input terminal.
VO = (VIN – VDAref) x n / 256 + VDAref
17
DO
6 LD
18 VDAref