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Developer Board and Interfaces Description
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98-08901C67-O
3.4.2.1
RS232
The 9-pin, D-type RS232-1 serial port (J350) is the primary interface to the g20 UUT. The UUT RS232 signals are active-low
CMOS-level signals (0-2.7 V), which are converted by the Developer Board to standard RS232 levels for PC communications.
3.4.2.2
USB
The USB interface (J300) operates according to the g20 UUT configuration. The Developer Board has a complete USB trans-
ceiver circuit to support USB communications for g20 units that do not include a USB driver of their own. The Developer Board
USB interface can be overridden manually when using a g20 unit that does include its own USB driver interface.
Table 9. RS232-1 Connector Pinout (J350)
Pin #
Description
DTE I/O
1
DCD
In
2
RXD
In
3
TXD
Out
4
DTR
Out
5
Ground
6
DSR
In
7
RTS
Out
8
CTS
In
9
RI
In
Note
The RS232-1 connector pin names are DTE-oriented.
Table 10. USB Connector Pinout (J300)
Pin #
Description
1
VCC
2
D-
3
D+
4
Ground
Содержание F3030A
Страница 1: ...D r a f t Developer s Guide Motorola g20 Developer s Kit 98 08901C67 O ...
Страница 2: ...ii 98 08901C67 O REVISION HISTORY Revision Date Purpose ...
Страница 10: ...Preface 4 98 08901C67 O ...
Страница 42: ...Developer Board and Interfaces Description 36 98 08901C67 O ...
Страница 44: ...Mechanical Description 38 98 08901C67 O ...
Страница 48: ...Service Support 42 98 08901C67 O ...
Страница 50: ...Schematics Placement and Parts List 44 98 08901C67 O Figure 23 Developer Board Top Level Design ...
Страница 51: ...98 08901C67 O 45 Schematics Placement and Parts List Figure 24 Diagnostics ...
Страница 52: ...Schematics Placement and Parts List 46 98 08901C67 O Figure 25 Power ...
Страница 53: ...98 08901C67 O 47 Schematics Placement and Parts List Figure 26 Debug Interface ...
Страница 54: ...Schematics Placement and Parts List 48 98 08901C67 O Figure 27 Keypad and Display ...
Страница 55: ...98 08901C67 O 49 Schematics Placement and Parts List Figure 28 Audio Interface ...
Страница 56: ...Schematics Placement and Parts List 50 98 08901C67 O Figure 29 LEDs ...
Страница 57: ...98 08901C67 O 51 Schematics Placement and Parts List Figure 30 Battery Charger ...
Страница 58: ...Schematics Placement and Parts List 52 98 08901C67 O Figure 31 Serial Interface ...
Страница 68: ...Schematics Placement and Parts List 62 98 08901C67 O ...
Страница 72: ...Index 66 98 08901C64 O ...