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參數(shù)資料
| 型號： | KS8701 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | FLEXTM Roaming Decoder II |
| 中文描述： | FLEXTM漫游解碼器二 |
| 文件頁數(shù)： | 17/73頁 |
| 文件大?。?/td> | 434K |
| 代理商： | KS8701 |
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Host-to-Decoder Packet Descriptions
KS8701
16
FLEX
TM
Roaming Decoder II
HOST-TO-DECODER PACKET DESCRIPTIONS
The following sections describe the packets of information sent from the host to the KS8701. 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 KS8701. The
KS8701 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 KS8701, the KS8701 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 KS8701. When the
KS8701 is disabled in this way, it prompts the host to read the Part ID Packet. Note that all other operation
continues normally when the KS8701 is
“
disabled
”
. Disabled only implies that data cannot be read, all other
internal operations continue to function.
When the KS8701 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 KS8701, 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 KS8701 is disabled. If a Checksum Packet is sent and the
CV
bits match the bits
in the checksum register, the KS8701 is enabled. If a Checksum Packet is sent when the KS8701 is already
enabled, the packet is ignored by the KS8701 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 KS8701 is enabled, the KS8701 will be
disabled until a Checksum Packet is sent with the correct
CV
bits.
When the host reads a packet out of the KS8701 but has no data to send, the Checksum Packet should be
sent so the KS8701 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 KS8701. When the host re-configures the KS8701, the
KS8701 will be disabled from sending any packets other than the Part ID Packet until the KS8701 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
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Byte 3
0
0
0
0
0
0.
0
0
Byte 2
CV
23
CV
15
CV
7
CV
22
CV
14
CV
6
CV
21
CV
13
CV
5
CV
20
CV
12
CV
4
CV
19
CV
11
CV
3
CV
18
CV
10
CV
2
CV
17
CV
9
CV
1
CV
16
CV
8
CV
0
Byte 1
Byte 0
CV:
Checksum Value
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KS8721BL | 3.3V 10/100 BASE-TX/FX PHYSICAL LAYER TRANSCEIVER |
| KS8721SL | 3.3V 10/100 BASE-TX/FX PHYSICAL LAYER TRANSCEIVER |
| KS8803B | 10 Channel PLL(10通道鎖相環(huán)) |
| KS8804B | 15 Channel PLL(15通道鎖相環(huán)) |
| KS8803 | 10/15 CH PLL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KS8721B | 功能描述:IC TXRX PHY 10/100 2.5V 48SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,140 系列:AU 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:CAN 電源電壓:5.3 V ~ 27 V 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:管件 其它名稱:935267940512AU5790D14AU5790D14-ND |
| KS8721B TR | 功能描述:IC TXRX PHY 10/100 2.5V 48SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,140 系列:AU 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:CAN 電源電壓:5.3 V ~ 27 V 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:管件 其它名稱:935267940512AU5790D14AU5790D14-ND |
| KS8721B_11 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:2.5V 10/100BasTX/FX MII Physical Layer Transceiver |
| KS8721BA4 | 功能描述:TXRX 10/100 3.3V 48-SSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,140 系列:AU 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:CAN 電源電壓:5.3 V ~ 27 V 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:管件 其它名稱:935267940512AU5790D14AU5790D14-ND |
| KS8721BA4 TR | 功能描述:TXRX 10/100 3.3V 48-SSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,140 系列:AU 類型:收發(fā)器 驅(qū)動器/接收器數(shù):1/1 規(guī)程:CAN 電源電壓:5.3 V ~ 27 V 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:管件 其它名稱:935267940512AU5790D14AU5790D14-ND |
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