參數(shù)資料
型號(hào)： SAA1575HL
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 通信及網(wǎng)絡(luò)
英文描述： Global Positioning System (GPS)baseband processor(通用定位系統(tǒng)基帶處理器)
中文描述： SPECIALTY TELECOM CIRCUIT, PQFP100
封裝： 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, SOT-407-1, LQFP-100
文件頁(yè)數(shù)： 6/56頁(yè)
文件大小： 744K
代理商： SAA1575HL
1999 Jun 04
6
Philips Semiconductors
Product specification
Global Positioning System (GPS)
baseband processor
SAA1575HL
6
PINNING
SYMBOL
PIN
I/O
DESCRIPTION
SCLK
1
O
Sample clock
: sample clock generated internally by dividing down the RCLK
(reference clock) input. This output is provided for use by the front-end IC.
GPS time pulse
: a 1 pulse per second output whose rising or falling edge (firmware
controlled) is synchronized to GPS time when the receiver is tracking a GPS signal.
The pulse length is approximately 1 ms.
Test pin
: tie HIGH
Test pin
: tie HIGH
GPIO bit 5
: standard general purpose I/O mapped into the segment 15 of the address
space. The top 4 bits can be used as the XA external timer control access pins
(T0, T1, T2 and T2EX).
GPIO bit 6
: standard general purpose I/O mapped into the segment 15 of the address
space. The top 4 bits can be used as the XA external timer control access pins
(T0, T1, T2 and T2EX).
GPIO bit 7
: standard general purpose I/O mapped into the segment 15 of the address
space. The top 4 bits can be used as the XA external timer control access pins
(T0, T1, T2 and T2EX).
Not connected
: do not connect
Not connected
: do not connect
External memory address bus bit 19
: 19-bit address bus; used to address external
RAM and program memory
External memory address bus bit 18
: 19-bit address bus; used to address external
RAM and program memory
Main core power supply
: 2.7 to 3.6 V only; main supply for the core in normal
operation
Ground
: 0 V reference
Crystal 1
: input to the inverting amplifier; used in the system oscillator circuit and
input to the internal clock generator circuits
Crystal 2
: output from the system oscillator amplifier
Main I/O power supply
: 2.7 to 5.5 V operating range; main supply for the periphery
in normal operation
Ground
: 0 V reference
External memory address bus bit 17
: 19-bit address bus; used to address external
RAM and program memory
External memory address bus bit 16
: 19-bit address bus; used to address external
RAM and program memory
External memory address bus bit 15
: 19-bit address bus; used to address external
RAM and program memory
External memory address bus bit 14
: 19-bit address bus; used to address external
RAM and program memory
External memory address bus bit 13
: 19-bit address bus; used to address external
RAM and program memory
External memory address bus bit 12
: 19-bit address bus; used to address external
RAM and program memory
T1S
2
O
TP3
TP4
GPIO5
3
4
5
I
I
I/O
GPIO6
6
I/O
GPIO7
7
I/O
n.c.
n.c.
A19
8
9
10
O
O
O
A18
11
O
V
CC(core)
12
V
SS
XTAL1
13
14
I
XTAL2
V
CC(P)
15
16
O
V
SS
A17
17
18
O
A16
19
O
A15
20
O
A14
21
O
A13
22
O
A12
23
O
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