參數(shù)資料
型號: SAA1575HL
廠商: NXP SEMICONDUCTORS
元件分類: 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
文件頁數(shù): 17/56頁
文件大?。?/td> 744K
代理商: SAA1575HL
1999 Jun 04
17
Philips Semiconductors
Product specification
Global Positioning System (GPS)
baseband processor
SAA1575HL
7.5.5
G
ENERAL PURPOSE
I/O
The SAA1575HL possesses an 8-bit general purpose I/O register and 8 associated I/Os (see Fig.8). With the standard
Philips firmware, all 8 of these pins are configured as outputs.
With the standard Philips firmware, only pin GPIO0 is used. This is switched on at the end of the firmware initialization
sequence and remains on subsequently.
Fig.7 Example timing for UAA1570HL programming.
X = don’t care.
handbook, full pagewidth
MHB466
RFCLK
RFDAT
control
holding
RFLE
1001
XXXX
XX10
1001
XXX1
X100
XXXX
Fig.8 GPIO pin drive circuits.
handbook, full pagewidth
MHB467
IOn
pull-up
FET
VCC(P)
GPIOn
pin
CLK
EN
D
DATA BUS
Q
WRITE ENABLE
READ ENABLE
CFGn
10
μ
A
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