Theory of Operation
: Bluetooth
3-65
The host processor is connected to the 3.3V SDRAM using a synchronous interface. The host
processor is connected to the OMAP on the Main Board by a full-speed USB (D11 & D12). VBus is a
sense line only.
Figure 3-52. Bluetooth USB Interface To Main Board
The ATMEL bootloader is being used as a first stage bootloader that will jump to the Motorola
bootloader, which is a stage two bootloader. GPIO20 is used by the ATMEL bootloader to trap in
Flash mode. GPIO19 will be used by the Motorola bootloader to trap in Flash mode. Both pins are
active low.
Table 3-16. USB I/O
Signal Name
Pin Name
Pad Name
Keypad Board
Schematic Name
I/O
GPIO19
C12
PA19
USB_BOOT_3.3V
I
GPIO20
D10
PA20
ATMEL_BOOT
I
DP
D11
–
BT_AVR_USB_DP
I/O
DM
D12
–
BT_AVR_USB_DM
I/O
VBUS
E12
–
BT_AVR_VBUS
I
USB_BOOT
ATMEL_BOOT
APX2000 Keypad Board 60-pin Connector
BT Debug Flex
ATMEL AVR32
AT32UC3A0512
PA19
VBUS
DP
DM
USB
PA20
C12
E12
D11
D12
D10
Pin 21
Pin 3
Pin 41
Pin 43
Factory Test Points
= Level Translator. 3.3 volts on AVR side
//
Summary of Contents for APX 2000
Page 1: ...APXTM TWO WAY RADIOS APX 1000 APX 2000 APX 4000 APX 4000Li DETAILED SERVICE MANUAL ...
Page 4: ......
Page 6: ...iv Document History Notes ...
Page 8: ...Notes vi Commercial Warranty ...
Page 10: ...Notes ...
Page 22: ...xiv List of Figures Notes ...
Page 226: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 688: ...Index 4 Index Notes ...
Page 690: ...ii Notes ...
Page 700: ...xvi List of Figures Notes ...
Page 806: ...5 50 Troubleshooting Charts PA Failure Notes ...
Page 1008: ...8 178 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 84012621001 Notes ...
Page 1062: ...8 234 Schematics Boards Overlays and Parts Lists Keypad Board M2 and M3 PC000261A01 Notes ...
Page 1064: ...ii Notes ...
Page 1068: ...Notes A 4 EMEA Warranty Service and Technical Support Further Assistance From Motorola ...
Page 1090: ...Glossary 10 Glossary Notes ...
Page 1094: ...Index 4 Index Notes ...
Page 1095: ......