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參數(shù)資料
| 型號： | IBM43GAENGP0002 |
| 廠商： | IBM Microeletronics |
| 英文描述： | IBM Global Positioning Satellite Receiver(IBM全球定位衛(wèi)星接收器) |
| 中文描述： | IBM全球定位衛(wèi)星接收機（IBM的全球定位衛(wèi)星接收器） |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 155K |
| 代理商： | IBM43GAENGP0002 |
IBM43GAENGP0002
IBM Global Positioning Satellite Receiver
General Information
Page 4 of 11
GP0001ds.fm (02)
August 11, 2000
Full Horizontal position accuracy for C/A is 20 m CEP.
1.5.3 Power Modes
The IBM GPS Receiver has the following three power modes:
Caution:
During off and battery backup modes, de-energize the RESET pin and the serial port. Do not drive to a logic
“
high
”
level.
1.5.4 Power-up Sequence
Power-up works the same way from either the off mode or the battery backup mode. The host system
supplies power as specified in
Table 3
below to the PWR pin of the GPS Receiver connector. If the RESET
pin is at logic
“
high
”
when DC power is applied, the receiver begins normal operation in approximately 200
milliseconds.
Table 2: Standard Positioning Service (SPS) Navigational Accuracy
Position (meters)
Horizontal
3D
Vertical
Circular Error Probability
(CEP)
Two Dimensional Root Mean Square
(2D RMS)
42
100 (95%)
1
187 (95%)
1
156 (95%)
1
1. Percentage of time this accuracy is attained.
Off Mode
The receiver is completely de-energized at all DC supplies, input signals, and
control signals.
Operate Mode
The receiver operates normally when energized by +3.3 ±.3 V DC. The RESET
control signal must be at a CMOS logic
“
high
”
level.
Battery Backup Mode
The receiver enters battery backup mode when the primary input power voltage is
removed, provided an external DC supply is connected to the Real Time Clock
(RTC) terminal. If the receiver is powered up in this mode, it uses the current time
from the RTC and critical satellite data stored in flash memory to achieve rapid
TTFF.
Table 3: External Power Requirements
Power Parameter
Requirement by Mode
Operate Mode
Battery Backup Mode
Voltage
3.3 V DC ± 10%
1.0 to 3.0 V DC
Power Consumption (Typical)
250 mA
4 μA
Power Consumption (Maximum)
300 mA
10 μA
Ripple Peak-to-Peak (P-P)
100 mV
N/A
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