參數(shù)資料
型號： S5T8701
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： FLEX ROAMING DECODER II
中文描述： FleX創(chuàng)建漫游解碼器二
文件頁數(shù)： 13/70頁
文件大?。?/td> 506K
代理商： S5T8701
S5T8701
FLEX
TM
ROAMING DECODER II
13
HOST-TO-DECODER PACKET DESCRIPTIONS
The following sections describe the packets of information sent from the host to the S5T8701. In all cases the
packets should be sent MSB first (bit 7 of byte 3 = bit 31 of the packet = MSB).
CHECKSUM PACKET
The Checksum Packet is used to insure proper communication between the host and the S5T8701. The S5T8701
exclusive-or
'
s the 24 data bits of every packet it receives (except the Checksum Packet and the special packet
ID's 1C through 1F hexadecimal) with an internal checksum register. Upon reset and whenever the host writes a
packet to the S5T8701, the S5T8701 is disabled from sending any information to the host processor until the host
processor sends a Checksum Packet with the proper checksum value (
CV
) to the S5T8701. When the S5T8701
is disabled in this way, it prompts the host to read the Part ID Packet. Note that all other operation continues
normally when the S5T8701 is
"
disabled
"
. Disabled only implies that data cannot be read, all other internal
operations continue to function.
When the S5T8701 is reset, it is disabled and the internal checksum register is initialized to the 24 bit part ID
defined in the Part ID Packet. See
"
Part ID Packet" on page 53 for a description of the Part ID. Every time a
packet other than the Checksum Packet and the special packets 1C through 1F is sent to the S5T8701, the value
sent in the 24 information bits is exclusive-or
'
ed with the internal checksum register, the result is stored back to
the checksum register, and the S5T8701 is disabled. If a Checksum Packet is sent and the
CV
bits match the bits
in the checksum register, the S5T8701 is enabled. If a Checksum Packet is sent when the S5T8701 is already
enabled, the packet is ignored by the S5T8701 in which case a null packet having the ID and data bits set to 0 is
suggested. If a packet other than the Checksum Packet is sent when the S5T8701 is enabled, the S5T8701 will
be disabled until a Checksum Packet is sent with the correct
CV
bits.
When the host reads a packet out of the S5T8701 but has no data to send, the Checksum Packet should be sent
so the S5T8701 will not be disabled. The data in the Checksum Packet could be a null packet (32 bit stream of all
zeros) since a Checksum Packet will not disable the S5T8701. When the host re-configures the S5T8701, the
S5T8701 will be disabled from sending any packets other than the Part ID Packet until the S5T8701 is enabled
with a Checksum Packet having the proper data. The ID of the Checksum Packet is 0.
Table 3: Checksum Packet Bit Assignments
Bit 7
0
CV
23
CV
15
CV
7
Bit 6
0
CV
22
CV
14
CV
6
Bit 5
0
CV
21
CV
13
CV
5
Bit 4
0
CV
20
CV
12
CV
4
Bit 3
0
CV
19
CV
11
CV
3
Bit 2
0.
CV
18
CV
10
CV
2
Bit 1
0
CV
17
CV
9
CV
1
Bit 0
0
CV
16
CV
8
CV
0
Byte 3
Byte 2
Byte 1
Byte 0
CV:
Checksum Value.
相關(guān)PDF資料
PDF描述
S5T8702 FEEX ALPHANUMERIC DECODER II
S5T8702X01-E0R0 FEEX ALPHANUMERIC DECODER II
S5T8803A01-D0B0 DIODE ZENER SINGLE 500mW 30Vz 4.2mA-Izt 0.05 0.1uA-Ir 23 SOD-123 3K/REEL
S5T8803A01-S0B0 DIODE ZENER SINGLE 200mW 30Vz 4.2mA-Izt 0.05 0.1uA-Ir 23 SOD-323 3K/REEL
S5T8803A 10 CH PLL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S5T8701X01-E0R0 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FLEX ROAMING DECODER II
S5T8702 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FEEX ALPHANUMERIC DECODER II
S5T8702X01-E0R0 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FEEX ALPHANUMERIC DECODER II
S5T8803A 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:10 CH PLL
S5T8803A01-D0B0 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:10 CH PLL
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*