參數(shù)資料
型號(hào): 935260577557
廠商: NXP SEMICONDUCTORS
元件分類: 無(wú)繩電話/電話
英文描述: TELECOM, CORDLESS, BASEBAND CIRCUIT, PQFP100
封裝: PLASTIC, SOT-407, LQFP-100
文件頁(yè)數(shù): 9/59頁(yè)
文件大小: 781K
代理商: 935260577557
1999 Jun 04
17
Philips Semiconductors
Product specication
Global Positioning System (GPS)
baseband processor
SAA1575HL
7.5.5
GENERAL 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
A
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