Figure 6-9. Vhf (146-174 Mhz) Controller Interconnect Schematic Diagram - Motorola EP450 Service Manual

VHF 146-174 MHz PCB 8486342Z13-C Schematic Diagrams, Overlays, and Parts Lists
28
27
26 25
24 23
22 21
20 19
18 17
16 15
D3_3 V
14 13
12 11
SW_B +
10
9
8 7
6
5
4 3
C503 2 1
30 29
1000pF
32 31
J460-1
CONNECTOR
ACCESSORY/KEYPA D
HKLN4216A
Controller
VS_AUDIO_SEL
OPT_MI C
OPT_TX_AUD_FLAT_RETURN
OPT_TX_AUD_RETURN
OPT_TX_AUD_SEN D
OPT_RX_AUD_SEND_DETECTO R
OPT_RX_AUD_SEND_UNMUTED
OPT_RX_AUD_RETURN
VS_GAIN_SEL
3V
E500
1
BK1005HM47
C500 C501
1uF
1000p F
R502
100
R504
100
R505
100
C406
150p F
R503 10 0
5V 3V
DISPL_COM_DATA_SEL
NC
VS_RAC
OPT_DATA_READY
BACKLIGHT
KEYPAD_ROW
KEYPAD_COL
DISP_EN A
OPT_EN A
VS_CS
VS_IN T
S441
SWITCH
1
A1 B1 2
PTT
3 A2 B2 4
OPT_BUTTON_ 1
S442
SWITCH
OPT_BUTTON_ 2
1 A1 B1 2 FREQ_SEL_ 3
S440
3 A2 B2 4
SWITCH
1
FREQ_SEL_ 0
S443 8 PC0
PC3
SWITCH 2
PC1 FREQ_SEL_ 1
4
1 A1 B1 2 PC2 FREQ_SEL_ 2
C0
C0
3 A2 B2 4
C1
C1
9 7
SW_B
5V +3 V
PWR_SET
DEMO D
BW_SEL
AUDI O
MOD_OUT
16_8_MHZ
R501
100
TP40 3
TP40 4
SYNTH_C S
LOCK
MICROPROCESSOR
RSSI
TX_EN A
RX_ENA
VOLUME
ON_OF F

Figure 6-9. VHF (146-174 MHz) Controller Interconnect Schematic Diagram

CNTL_PWR_SET
PWR_SET
CNTL_DEMO D
DEMOD
CNTL_BW_SEL
BW_SEL
T
MOD_OUT
CNTL_16_8_MHZ
16_8_MHZ
CNTL_SPI_CLK
SPI_CLK
CNTL_SPI_DATA_OUT
SPI_DATA_OUT
CNTL_SYNTH_C S
SYNTH_CS
CNTL_LOCK
LOCK
CNTL_RSSI
RSSI
CNTL_TX_EN A
TX_ENA
+ +
5V 5R 5T 3V D3_3V
CNTL_USWB+
USWB+
CNTL_5 V
TP301 5V
CNTL_5R
5R
CNTL_5T
5T
CNTL_3 V
3V
RESET
BATT_CHARGE
RX_EN A
DC_REGULATION
VOLUME
ON_OF F
TX_EN A
November 24, 2003
6-11