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參數(shù)資料
| 型號(hào)： | KS8993ML |
| 廠商： | Micrel Inc |
| 文件頁(yè)數(shù)： | 35/85頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC SWITCH 10/100 3PORT 128PQFP |
| 標(biāo)準(zhǔn)包裝： | 66 |
| 系列： | * |
| 類型： | * |
| 應(yīng)用： | * |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 128-BFQFP |
| 供應(yīng)商設(shè)備封裝： | 128-PQFP（14x20） |
| 包裝： | 散裝 |
| 配用： | 576-1016-ND - BOARD EVAL FOR KS8993ML |
| 其它名稱： | 576-1015 |
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Micrel, Inc.
KS8993M/ML/MI
April 2005
40
M9999-041205
SPI multiple read is initiated when the master device continues to drive the KS8993M SPIS_N input pin (SPI
Slave Select signal) low after a byte (a register) is read. The KS8993M internal address counter will increment
automatically to the next byte (next register) after the read. The next byte at the next register address will be
shifted out onto the KS8993M SPIQ output pin. SPI multiple read will continue until the SPI master device
terminates it by de-asserting the SPIS_N signal to the KS8993M.
Similarly, SPI multiple write is initiated when the master device continues to drive the KS8993M SPIS_N input pin
low after a byte (a register) is written. The KS8993M internal address counter will increment automatically to the
next byte (next register) after the write. The next byte that is sent from the master device to the KS8993M SDA
input pin will be written to the next register address. SPI multiple write will continue until the SPI master device
terminates it by de-asserting the SPIS_N signal to the KS8993M.
For both SPI multiple read and multiple write, the KS8993M internal address counter will wrap back to register
address zero once the highest register address is reached. This feature allows all 128 KS8993M registers to be
read, or written with a single SPI command and any initial register address.
The KS8993M is capable of supporting a 5MHz SPI bus.
The following is a sample procedure for programming the KS8993M using the SPI bus:
1.
At the board level, connect the KS8993M pins as follows:
KS8993M Pin #
KS8993M Signal Name
External Processor Signal Description
99
SPIS_N
SPI Slave Select
97
SCL
(SPIC)
SPI Clock
98
SDA
(SPID)
SPI Data
(Master output; Slave input)
96
SPIQ
SPI Data
(Master input; Slave output)
Table 11. KS8993M SPI Connections
2.
Enable SPI slave mode by setting the KS8993M strap-in pins PS[1:0] (pins 100 and 101, respectively) to “10”.
3.
Power up the board and assert reset to the KS8993M.
After reset, the “Start Switch” bit (register 1 bit 0) will be set to ‘0’.
4.
Configure the desired register settings in the KS8993M, using the SPI write or multiple write command.
5.
Read back and verify the register settings in the KS8993M, using the SPI read or multiple read command.
6.
Write a ‘1’ to the “Start Switch” bit to start the KS8993M with the programmed settings.
Note: The “Start Switch” bit cannot be set to ‘0’ to stop the switch after an ‘1’ is written to this bit. Thus, it is
recommended that all switch configuration settings are programmed before the “Start Switch” bit is set to ‘1’.
Some of the configuration settings, such as “Aging enable”, “Auto Negotiation Enable”, “Force Speed” and “Power
down” can be programmed after the switch has been started.
The following four figures illustrate the SPI data cycles for “Write”, “Read”, “Multiple Write” and “Multiple Read”.
The read data is registered out of SPIQ on the falling edge of SPIC, and the data input on SPID is registered on
the rising edge of SPIC.
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| KS8995MAI | IC SWITCH 10/100 5PORT 128PQFP |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KS8993ML-EVAL | 功能描述:BOARD EVAL FOR KS8993ML RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電源管理，電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板 |
| KS8995 | 制造商:KENDIN 功能描述:KS8995 制造商:Micrel Inc 功能描述:SPECIAL FUNCTION IC, Silicon Manufacturer:Micrel Semiconductor, Silicon Core Num |
| KS8995E | 制造商:Micrel Inc 功能描述: |
| KS8995E-EVAL | 功能描述:BOARD EVAL EXPERIMENT KS8995E RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電源管理，電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板 |
| KS8995FQ | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Integrated 5-Port 10/100 Managed Switch |
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