Kenwood TS-2000, Service Manual

Page: 48 / 171

48
TS-2000/X
DAC : M62363FP (TX-RX 1 unit IC14)
■
Block diagram
8-bit latch 8-bit latch
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11
Address
decoder
12-bit shift register
7
19
5
6
17
8
D-A
converter
D-A
converter
23 24 2 1 20
18
DI
CLK
RESET
VDD
GND VIN1 VOUT1 VIN8 VOUT8
VDAref
LD
DO
■
Pin function
No. Symbol Function
8 DI Serial data input terminal.
17 DO Serial data output terminal.
7 CLK Serial clock input terminal.
6 LD LD terminal input high level then latch circuit
data load.
19 RESET Reset terminal.
2 VOUT1 8-bit resolution D-A output.
3 VOUT2
10 VOUT3
11 VOUT4
14 VOUT5
15 VOUT6
22 VOUT7
23 VOUT8
5 VDD Power supply terminal.
20 GND GND terminal.
1 VIN1 D-A converter input terminal.
4 VIN2
9 VIN3
12 VIN4
13 VIN5
16 VIN6
21 VIN7
24 VIN8
18 VDAref D-A converter reference voltage input terminal.
VO = (VIN – VDAref) x n / 256 + VDAref
SEMICONDUCTOR DATA
∑
COMP
IOUT
FSELECT
BIT
REFIN FS ADJUST REFOUT DVDD
SELSRC
FREQ0 REG
FREQ1 REG
MUX
Phase
Accumulator
(32 bit)
SYNC
SYNC
SYNC
SYNC
MUX
COS
ROM
10-bit
DAC
12
PHASE0 REG
PHASE1 REG
PHASE2 REG
PHASE3 REG
16-bit Data Register
Decode Logic
Serial Register
8 MSBs 8 LSBs
Control Register
FSELECT/PSEL
Register
Defer
Register
PSEL0
BIT
SELSRC
9
FSYNC
7
SCLK
8
SDATA
11
PSEL0
PSEL1
BIT
12
14
PSEL1
16
ON-Board
Reference Full-Scale
Control
10
FSELECT
6
MCLK
1 3 4
DGND
5
AVDD
15
AGND
13 2
DDS : AD9835 (TX-RX 1
u
nit IC601~603,
TX-RX 2
u
nit IC406~408)
■
Block diagram
■
Pin function
No. Symbol Function
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