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| 型號： | 935260577557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | TELECOM, CORDLESS, BASEBAND CIRCUIT, PQFP100 |
| 封裝： | PLASTIC, SOT-407, LQFP-100 |
| 文件頁數(shù)： | 53/59頁 |
| 文件大小： | 781K |
| 代理商： | 935260577557 |
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SAA1575HL
Information as of 2000-08-23
SAA1575HL; Global Positioning System (GPS) baseband processor
The SAA1575HL is an integrated circuit which implements a complete baseband function for Global Positioning System (GPS) receivers. It
combines a 16-bit Philips 80C51XA microcontroller, 8 GPS channel correlators and related peripherals in a single IC. Users can implement
a complete GPS receiver using only the SAA1575HL, the UAA1570HL front-end Philips IC (or similar), external memory and a few discrete
components.
The IC is aimed at low cost applications. A low power solution was also used where possible, although this was of secondary importance to
cost. The core of the SAA1575HL operates at 3 V.
However, for compatibility with current automotive applications, the periphery is supplied from separate pins and can be operated between
3 and 5 V, as required.
The function of the SAA1575HL is to read the 1 or 2-bit sampled IF bitstream from a front-end IC and, under control of firmware on an
external ROM, calculate the full GPS solution. The results are communicated to a host in National Maritime Electronics Association
(NMEA) format via a standard serial port. A second serial port can be used to provide differential GPS information to the processor for
more advance applications. In addition, various other functions are integrated onto the IC such as a real-time GPS clock, a power-
down/reset controller, timer/counters and a watchdog timer.
To summarise, the SAA1575HL has the following functional units:
l
16-bit 80C51XA microcontroller core
l
2 kbytes words on-chip SRAM (16-bit words)
l
8 GPS channel correlators
l
2 UARTs
l
8 general purpose I/O lines
l
3 timer/counters
l
1 real-time clock
l
1 watchdog timer
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Description
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