參數(shù)資料
型號(hào)： PCD5008
廠商： NXP Semiconductors N.V.
英文描述： FLEX Pager Decoder
中文描述： FleX創(chuàng)建傳呼機(jī)解碼器
文件頁(yè)數(shù)： 22/64頁(yè)
文件大?。?/td> 341K
代理商： PCD5008
1998 Jun 17
22
Philips Semiconductors
Product specification
FLEX
Pager Decoder
PCD5008
8.5.5
R
ECEIVER WARM
-
UP SEQUENCES
8.5.5.1
Normal receiver warm-up sequence
The PCD5008 allows for up to 6 steps associated with
warming up the receiver. When the PCD5008 turns on the
receiver while decoding, it starts the warm-up sequence
160 ms before it requires valid signals at the EXTS1 and
EXTS0 input pins.
1.
The PCD5008 leaves the receiver control lines in the
off state for the programmed warm-up off time.
2.
The first warm-up setting, if enabled, is applied to the
receiver control lines for the amount of time
programmed for that setting.
3.
Subsequent warm-up settings are applied to the
receiver control lines for their corresponding time until
a disabled warm-up setting is found.
4.
At the end of the last used warm-up setting, the
1600 symbols per second (sps) sync setting or the
3200 sps sync setting is applied to the receiver control
lines depending on the PCD5008 current state.
The PCD5008 must be configured such that the sum of all
of the used warm-up times and the warm-up off time does
not exceed 160 ms.
If it exceeds 160 ms, the PCD5008 executes the receiver
shut-down sequence 160 ms after the start of the warm-up
off time. If the sum of all of the used warm-up times and the
warm-up off times is less than 160 ms, the receiver
remains in the 1600 sps sync setting or the 3200 sps sync
setting from the end of the last used warm-up setting until
valid signals are expected (160 ms after the start of the
warm-up off time). Figure 12 shows the receiver warm-up
sequence while decoding, when all warm-up settings are
enabled.
8.5.5.2
First receiver warm-up sequence
When the PCD5008 is turned on by setting the ON bit in
the control packet, the receiver warm-up sequence differs
from the sequence described in Section 8.5.5.1. After the
ON bit is set no receiver warm-up off time is applied,
instead the PCD5008 immediately begins to apply the
receiver warm-up settings. When a disabled warm-up
setting is found, the decoder applies 3200 sps sync setting
to the receiver control lines. The decoder then expects
valid signals after the 3200 sps sync warm-up time.
Figure 13 shows the receiver warm-up sequence when the
PCD5008 is first turned on and when all warm-up settings
are enabled.
Fig.12 Receiver warm-up sequence while decoding.
handbook, full pagewidth
MGK265
receiver
control
line setting
warm up
off time
warm up
time 1
warm up
setting 1
possible
LOBAT
check
off
warm up
time 2
warm up
setting 2
possible
LOBAT
check
possible
LOBAT
check
warm up
time 3
160 ms
warm up
setting 3
possible
LOBAT
check
warm up
time 4
warm up
setting 4
possible
LOBAT
check
warm up
time 5
warm up
setting 5
possible
LOBAT
check
1600 sps or 3200 sps
sync setting
EXTS1 & EXTS0
signals are expected
to be valid here
Fig.13 First receiver warm-up sequence after turning decoding on.
handbook, full pagewidth
MGK266
receiver
control
line setting
warm up
time 1
warm up
setting 1
possible
LOBAT
check
off
warm up
time 2
warm up
setting 2
possible
LOBAT
check
possible
LOBAT
check
warm up
time 3
warm up
setting 3
possible
LOBAT
check
warm up
time 4
warm up
setting 4
possible
LOBAT
check
warm up
time 5
warm up
setting 5
possible
LOBAT
check
3200 sps sync
warm up
time
3200 sps
sync setting
EXTS1 & EXTS0
signals are expected
to be valid here
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCD5008H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:FLEX Pager Decoder
PCD5008HBD-T 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication Decoder
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PCD5013H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:FLEX roaming decoder II
PCD5032 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ADPCM CODEC for digital cordless telephones
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