3-52
Theory of Operation
: Bluetooth
Figure 3-42. Detailed Low-Frequency Transmit/Receive Paths
3.5.1
Bluetooth Power
Our Bluetooth IC operates from a 3.6V (U6504, VBAT) switching regulator located on the Main board
to supply the Bluetooth IC core and a 1.85V (U6508, VDDS) supply for the I/O. It has a shutdown
(U2415 pin L3) that must be high for operation to work. The power-up/down sequence required for
operation is shown in
Figure 3-43
.
Figure 3-43. Chip Power-Up/Power-Down Sequence (Exernal Input/Output Shown)
32KHZ_3.3V
R2457
15K
C2475
1000PF
R2474
270K
NFC_ANTENNA
OUT
C2457
18PF
U2412
NL17SZ02
R2475M3
150
USART1_TX
R2477
100K
7
16
15
R2419
100
G1
R2476
100K
TC1_OCA
4
1
2
TX path
GPS_BT_3.3V
12
9
14
6
8
1
2
10
SCL
DAT
SDO
XOUT
WAKE
NC1
NC2
NC3
VCC
CS
SDI
XIN
LFN
LF1P
VSS
GND
CTGND
C2465
1UF
GPS_BT_3.3V
U2403M3
AS3930A
51009735001
11
13
5
4
3
RX path
NFC_CS_INV
C2454
220PF
1%
APX 3000
Partial Current Tree
7.5V Batt
VDDS
VBAT
VDD1P8
RTC
Startup
CLK_REQ_POL
TCXO_CLK_REQ
VDD_TCXO
Hi Z - PD
Max 36.5 ms
5 ms
Analog PORz (~135 RTC cycles) +
Efuse shifting (~1000 RTC cycles)
Max time from clock request/
voltage to TCXO_CLK availability
Hi Z - PD
TCXO_CLK
REF_CLK_REQ
(OR of
nshutdown
pins)
<2.5ms
or
Содержание Astro APX 3000
Страница 1: ...APXTM TWO WAY RADIOS APX 3000 DETAILED SERVICE MANUAL ...
Страница 2: ......
Страница 4: ...Notes ...
Страница 6: ...vi Document History Notes ...
Страница 10: ...x Table of Contents Notes ...
Страница 12: ...xii List of Tables Notes ...
Страница 18: ...xviii List of Figures Notes ...
Страница 22: ...xxii CommercialWarranty Notes ...
Страница 46: ...3 20 Theory of Operation Main Board Notes ...
Страница 84: ...3 58 Theory of Operation Bluetooth Notes ...
Страница 147: ...Troubleshooting Waveforms Clocks 6 3 6 2 2 4 MHz Clock Trace 1 Trace recorded at R6113 Figure 6 2 4 MHz Clock Waveform ...
Страница 154: ...6 10 Troubleshooting Waveforms Audio SSI 6 3 4 BCLK Trace 1 Trace recorded at R6107 Figure 6 9 Audio SSI BCLK Waveform ...
Страница 156: ...6 12 Troubleshooting Waveforms RX SSI 6 4 2 DA Trace 1 Trace recorded at R2805 Figure 6 11 RX SSI DA Waveform ...
Страница 157: ...Troubleshooting Waveforms RX SSI 6 13 6 4 3 FSYNC Trace 1 Trace recorded at R2804 Figure 6 12 RX SSI FSync Waveform ...
Страница 159: ...Troubleshooting Waveforms TX SSI 6 15 6 5 2 DA Trace 1 Trace recorded at R2817 Figure 6 14 TX SSI DA Waveform ...
Страница 160: ...6 16 Troubleshooting Waveforms TX SSI 6 5 3 FSYNC Trace 1 Trace recorded at R2807 Figure 6 15 TX SSI FSync Waveform ...
Страница 161: ...Troubleshooting Waveforms SPI 6 17 6 6 SPI 6 6 1 CLK Trace 1 Trace recorded at R2803 Figure 6 16 SPI CLK Waveform ...
Страница 162: ...6 18 Troubleshooting Waveforms SPI 6 6 2 CS Trace 1 Trace recorded at R6602 Figure 6 17 CS Waveform ...
Страница 164: ...6 20 Troubleshooting Waveforms I2C BUS 6 7 2 SCL 5V Trace 1 Trace recorded at R2204 Figure 6 19 I2C Bus SCA 5V Waveform ...
Страница 165: ...Troubleshooting Waveforms I2C BUS 6 21 6 7 3 SDA Trace 1 Trace recorded at R6209 Figure 6 20 I2C Bus SDA Waveform ...
Страница 169: ...Troubleshooting Waveforms USB 6 25 6 10 USB 6 10 1 D Trace 1 Trace recorded at TP F_GCAI_USB Figure 6 24 USB D Waveform ...
Страница 170: ...6 26 Troubleshooting Waveforms USB 6 10 2 D Trace 1 Trace recorded at TP F_GCAI_USB Figure 6 25 USB D Waveform ...
Страница 172: ...6 28 Troubleshooting Waveforms SDRAM 6 11 2 CLKX Trace 1 Trace recorded at TP6308 Figure 6 27 SDRAM CLKX Waveform ...
Страница 208: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Страница 222: ...7 14 Troubleshooting Tables List of Board and IC Signals Notes ...
Страница 282: ...8 60 Schematics Boards Overlays and Parts Lists Main Board Block UHF1 84012513001_A Notes ...
Страница 338: ...8 116 Schematics Boards Overlays and Parts Lists Main Board Block 700 800 MHz 84012501002 Notes ...
Страница 390: ...8 168 Schematics Boards Overlays and Parts Lists Main Board Block VHF 84012512001_A Notes ...
Страница 456: ...9 8 Debugging Fixture Powering up Covert Board Notes ...
Страница 468: ...Glossary 10 Glossary Notes ...
Страница 472: ...Index 4 Index Notes ...
Страница 473: ......