Kenwood TS-990S Service Manual page 224

TS-990S
Pin No. Name I/O
10 TH33B O
11 VD I
12 MRXC O
13 ADC1 O
14 ADC2 O
15 MLPX1 I
16 MLPY1 I
17 CLK O
18 DATA O
19 GND -
20 BOVER I
21 BKC I
22 X53V2 I
23 DGND -
24 NC -
25 DGND -
ACDC-
26 O
SW
27 ACDCTH I
28 PSC O
29 14SW O
30 PSC33 O
31 X45V2 I
32 X45V1 I
33 ODP I
34 CTXD O
35 CRXD I
36 CRTS O
37 CCTS I
38 50VSW O
39 EXTPF1 I
40 EXTPF2 I
CN71 (to Digital unit CN4)
1 DC18SW O
2 DC12SW O
3 VTXD O
4 VRXD I
5 VRTS O
6 VCTS I
7 NC -
224
TERMINAL FUNCTION
Function
3.3V power supply for thermister
Drain voltage input for meter
Main RX control signal
Multiplexer control signal 1
Multiplexer control signal 2
Multiplexer (IC50) X-common data input
Multiplexer (IC50) Y-common data input
Serial clock
Serial data
GND
Over voltage detection L: Over voltage
Reduced voltage detection interrupt
L: Reduced voltage
Version detection signal
H: ver.1, L: ver.2
Digital GND
No connection
Digital GND
AC/DC power control H: Active
AC/DC temperature detection
Power switch control (5V/8V/LCD driver
power) H: Active
Power switch control for 14V H: Active
Power switch control for 3.3V H: Active
Version detection signal
H: ver.1, L: ver.2
Version detection signal
H: ver.1, L: ver.2
Over drive protection
RS-232C transmitted data
RS-232C received data
RS-232C request to send
RS-232C clear to send
Power switch control for 50V H: Active
External PF1 signal input
External PF2 signal input
Switch signal for digital 1.8V DC/DC
converter H: Active
Switch signal for digital 1.2V DC/DC
converter H: Active
Serial data output to USB-serial bridge
Serial data input from USB-serial bridge
RTS signal output to USB-serial bridge
CTS signal input from USB-serial bridge
No connection
Pin No. Name I/O
USB connection interrupt input
8 VBINT I
H: connection
9 32KOUT O 32kHz CLK to application MCU
Reduced voltage detection interrupt
10 BKC O
L: Active
11 MATXD O Serial data output to application MCU
12 MARXD I Serial data input from application MCU
13 MARTS O RTS signal output to application MCU
14 MACTS I RTS signal input from application MCU
Application MCU check signal
15 AHLT I
H: Status OK
16 ARST O Reset to application MCU L: Active
Switch signal for USB device power
17 USBSW O
H: Active
Switch signal for digital 3.3V FET(Q805)
18 33SW1 O
H: Active
Switch signal for digital 3.3V FET(Q803)
19 33SW2 O
H: Active
Serial communication chip select to ap-
20 SCCS0 O
plication MCU
21 SCSOMI I Serial data input from application MCU
22 SCSIMO O Serial data output to application MCU
23 NC - No connection
Serial communication CLK to application
24 SCCLK O
MCU
25 GND - GND
26 PARXD I Serial data input from application MCU
27 PATXD O Serial data output to application MCU
28 GND - GND
LCD active request to application MCU
29 LCDREQ O
H: Active
30 PSC O Power switch control H: Active
31 NC - No connection
32 5D I 5V (DC/DC)
CN72 (to DSP unit CN101)
1 NC - No connection
Reduced voltage detect interrupt
2 BKC O
L: Active
3 DTXD O Serial data output to DSP MCU
4 DRXD I Serial data input from DSP MCU
5 DRTS O RTS signal output to DSP MCU
6 DCTS I RTS signal input from DSP MCU
7 DRES O Reset signal for DSP MCU
Programming mode request
8 DFPRG I/O
L: Programming mode
9 CKY O RF power ON/OFF H: RF power ON
10 TXC O TX ON/OFF H: TX ON
1.2V DC/DC convertor SW control
11 14SW O
H: Active
Function