Txmrx-Dsp - Kenwood TS-990S Service Manual

TS-990S
Pin No. Name I/O
21 SDSCS O
22 NC O
23 MDRET O
24 SDRET O
25 BEEP O
26 MVOX I
27 SWST1 I
28 AVOX I
29 NC O
30 TXC I
31 CKY I
32 MABK1 I
33 SABK1 I
34 MABK2 I
35 SABK2 I
36 MIBK I
37 SIBK I
38 MDREQ I
39 SDREQ I
40 NC O
41 BKC I
42 DFRRG I
43 DRXD I
44 DTXD O
45 DCTS I
46 DRTS O
47 MCTDET I
48 SCTDET I
49 AN0 O
50 AN1 O
51 NC O
68
SEMICONDUCTOR DATA
Function
SRX-DSP chip select
L: Enable
No connection
Communication request to TXMRX-DSP
Communication request to SRX-DSP
Beep pattern instruction
H: Beep output
VOX transmit (MIC) signal input
H: Active
SRX-DSP programming status signal
input
VOX transmit (ANI) signal input
H: Active
No connection
TX ON/OFF
H: TX ON
RF power ON/OFF
H: Power ON
AF blanking signal input for TXMRX-DSP
H: Mute
AF blanking signal input for SRX-DSP
H: Mute
AF blanking signal input for TXMRX-DSP
H: Mute
AF blanking signal input for SRX-DSP
H: Mute
IF blanking signal input for TXMRX-DSP
H: Mute
IF blanking signal input for SRX-DSP
H: Mute
Communication request form TXMRX-
DSP
Communication request form SRX-DSP
No connection
Reduced voltage detect interrupt
HL: Interrupt
Compulsion fi rmware programming
Mode detect
Serial data input from main MPU
Serial data output for main MPU
RTS signal input from main MPU
RTS signal output to main MPU
CTCSS detection signal input form

TXMRX-DSP

H: CTCSS detection
CTCSS detection signal input form SRX-
DSP
H: CTCSS detection
No connection
No connection
No connection
Pin No. Name I/O
ACC2 audio/ USB audio select
52 ANISEL O
H:USB audio/ L: ACC2 audio
Modulation select
53 MODSEL O
H: FM modulation/ L: TIF
54 SMUTE2 O Audio mute control for Ext.SP2
55 SMUTE 1 O Audio mute control for SP1/Ext.SP1
56 PMUTE O Audio mute control for phone circuite
57 SP2DET I Ext.SP2 detection
Boot confi guration select for TXMRX-
58 MDBT O DSP
H: FLASH boot/ L: SPI slave boot
Boot confi guration select for SRX-DSP
59 SDBT O
H: FLASH boot/ L: SPI slave boot
60 PHDET I Phone detection
61 VOLEN O Load enable for DAC (IC658)
62 VOLDT O Data output for DAC (IC658)
63 VOLCK O Clock output for DAC (IC658)
64 NC O No connection
TXMRX-DSP: (DSP unit IC202)
Pin No. Name I/O
1 VDDINT I Internal (core) supply voltage (1.2V)
CLK_ Core to CLKIN raito control (GND con-
2 I
CFG0 nect)
CLK_ Core to CLKIN raito control (GND con-
3 I
CFG1 nect)
BOOT_
4 I Boot confi guration select (GND connect)
CFG0
Boot confi guration select
5 MDBT I
H: FLASH boot/ L: SPI slave boot
6 GND - GND
7 VDDEXT I External (I/O) supply voltage (3.3V)
8 GND - GND
9 VDDINT I Internal (core) supply voltage (1.2V)
10 GND - GND
11 VDDINT I Internal (core) supply voltage (1.2V)
12 GND - GND
13 VDDINT I Internal (core) supply voltage (1.2V)
14 GND - GND
Communication request from DSP-sub
15 MDRET I
MCU
Communication request to DSP-sub
16 MDREQ O
MCU
17 AD7 I/O Address/Data bus for fl ash memory
18 GND - GND
19 VDDINT I Internal (core) supply voltage (1.2V)
20 GND - GND
21 VDDEXT I External (I/O) supply voltage (3.3V)
Function
Function