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參數資料
| 型號： | PCD5008 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | FLEX Pager Decoder |
| 中文描述： | FleX創建傳呼機解碼器 |
| 文件頁數： | 9/64頁 |
| 文件大小： | 341K |
| 代理商： | PCD5008 |
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1998 Jun 17
9
Philips Semiconductors
Product specification
FLEX
Pager Decoder
PCD5008
8.3.3
SPI
TRANSFER INITIATED BY THE HOST
The following steps occur when the host initiates an SPI
packet transfer, see Fig.5 for event timings:
1.
The host selects the PCD5008 by driving the
SS pin LOW.
2.
The PCD5008 indicates that it is ready to start the
SPI transfer by driving the READY pin LOW.
3.
The host clocks each of the 32 bits of the SPI packet
by pulsing SCK. Both the host and the PCD5008
sample data on the rising edge of SCK. Packets are
sent MSB first.
4.
The PCD5008 pulls the READY line HIGH, to indicate
that the transfer is complete.
The host waits until the READY line is pulled HIGH,
then de-selects the PCD5008 SPI by driving the
SS pin HIGH.
The first 5 steps are repeated for each additional
packet.
5.
6.
Fig.5 Typical multiple SPI transfers initiated by the host.
handbook, full pagewidth
MGK262
MISO
MOSI
SCK
Zo(off)
(1)
(5)
(4)
(2)
(3)
D31
D1
D0
D31
D1
D0
Zo(off)
D31
D1
D0
D31
D1
D0
Zo(off)
Zo(off)
D31
D1
D0
D31
D1
D0
READY
Numbers within parenthesis refer to sequence numbers, see Section 8.3.3.
8.3.4
SPI
TRANSFER INITIATED BY THE DECODER
The following steps occur when the PCD5008 initiates an
SPI packet transfer, see Fig.6 for event timings:
1.
The PCD5008 initiates the SPI transfer by driving the
READY pin LOW.
2.
If the PCD5008 is not already selected, the host
selects the PCD5008 SPI by driving the SS pin LOW.
3.
The host clocks each of the 32 bits of the SPI packet
by pulsing SCK. Both the host and the PCD5008
sample data on the rising edge of SCK. Packets are
sent MSB first.
The PCD5008 pulls the READY line HIGH, to indicate
that the transfer is complete.
The host may then either de-select the SPI interface of
the PCD5008 (Fig.7) by driving the SS pin HIGH or
maintain SS LOW to continue sending packets to the
PCD5008.
4.
5.
相關PDF資料 |
PDF描述 |
|---|---|
| PCD5008H | FLEX Pager Decoder |
| PCD5013 | FLEX roaming decoder II |
| PCD5013H | FLEX roaming decoder II |
| PCD5032 | ADPCM CODEC for digital cordless telephones |
| PCD5032H | ADPCM CODEC for digital cordless telephones |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| PCD5013 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:FLEX roaming decoder II |
| 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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