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參數(shù)資料
| 型號： | GPS140HR |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | GPS Positioning Module |
| 中文描述： | GPS定位模塊 |
| 文件頁數(shù)： | 26/38頁 |
| 文件大?。?/td> | 282K |
| 代理商： | GPS140HR |
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GPS140HR
26
RTD Embedded Technologies, Inc.
Chapter 5
B
OARD OPERATION AND PROGRAMMING
This chapter shows you how to program and use your GPS140HR. It provides a
general description of the I/O map. Detailed serial port programming tips are not
within the scope of this manual.
Defining the Memory
Map
The memory map of the GPS140HR occupies eight bytes of host PC I/O space. This
window is freely selectable by the user as described in
Chapter 2, Table 2-2.
After
setting the base address you have access to the internal resources of the GPS140HR
control logic. These resources are not described in detail, since they are mapped as a
standard PC serial port. For more details on the EXAR ST16C550IJ44 UART chip
programming please download the component specific data sheet from the
manufacturers website:
http://www.exar.com/products/st16c550.html
ADDR
REGISTER
DIR
TXD
O
BASE
BAUD div. low
Only if control reg. Bit 7=0
RXD
I
Only if control reg. Bit 7=0
Only if control reg. Bit 7=1
BAUD div. high
Only if control reg. Bit 7=1
BASE+1
IRQ enable
Only if control reg. Bit 7=0
BASE+2
IRQ ID
BASE+3
Line control
BASE+4
Modem control
BASE+5
BASE+6
Line status
Modem status
Table 5-1 General I/O map of the GPS140HR
BASE = Base Address
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