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| 型号： | KSZ8851-16MLL-EVAL |
| 厂商： | Micrel Inc |
| 文件页数： | 18/84页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION KSZ8851-16MLL |
| 产品培训模块： | KSZ8851 10/100 Embedded Controllers |
| 标准包装： | 1 |
| 系列： | LinkMD® |
| 主要目的： | 接口，以太网控制器（PHY 和 MAC） |
| 嵌入式： | 否 |
| 已用 IC / 零件： | KSZ8851-16MLL |
| 主要属性： | 1 个端口，100BASE-TX/10BASE-T |
| 次要属性： | 8/16 位接口，LinkMD 线缆诊断 |
| 已供物品： | 板，文档 |
| 产品目录页面： | 1081 (CN2011-ZH PDF) |
| 相关产品： | 576-3438-ND - IC CTLR MAC/PHY NON PCI 128PQFP 576-3253-ND - IC CTLR MAC/PHY NON-PCI 128-PQFP 576-3252-ND - IC CTLR MAC/PHY NON-PCI 48-LQFP |
| 其它名称： | 576-3292 |
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Micrel, Inc.
KSZ8851-16MLL/MLLI
March 11, 2014
25
Revision 2.2
Asynchronous Interface
For asynchronous transfers, the asynchronous interface uses RDN (read) and WRN (write) signal strobes for data
latching. The host utilizes the rising edge of RDN to latch READ data when the host read data from KSZ8851-16MLL. The
KSZ8851-16MLL utilizes the internal pulse to latch WRITE data based on the RXFDPR register bit 12 setting.
All asynchronous transfers are either single-data or burst-data transfers. Byte or word data bus access (transfers) is
supported. The BIU, however, provides flexible asynchronous interfacing to communicate with various applications and
architectures. No additional address latch is required. The BIU qualifies both CSN (Chip Select) pin and WRN (Write
Enable) pin to write the Address A[7:2] and BE[3:0] value (in 16-bit mode) or Address A[7:0] value (in 8-bit mode) into
KSZ8851-16MLL when CMD (Command type) pin is high. The BIU qualifies both CSN (Chip Select) pin and RDN (Read
Enable) or WRN (Write Enable) pin to read or write the SD[15:0] data value from or to KSZ8851-16MLL when CMD
(Command type) pin is low.
In order for software to read back the previous CMD register write value when CMD is “1”, the BIU qualifies both CSN
(Chip Select) pin and RDN (Read Enable) pin to read the Address A[7:2] and BE[3:0] value (in 16-bit mode) or Address
A[7:0] value (in 8-bit mode) back from KSZ8851-16MLL when CMD (Command type) pin is high.
BIU Summation
Figure 6 shows the connection for different data bus sizes. Also refer to reference schematics in hardware design
package.
All of control and status registers in the KSZ8851-16MLL are accessed indirectly depending on CMD (Command type)
pin. The command sequence to access the specified control or status register is to write the register’s address (when
CMD=1) then read or write this register data (when CMD=0). If both RDN and WRN signals in the system are only used
for KSZ8851-16MLL, the CSN pin can be forced to active low to simplify the system design. The CMD pin can be
connected to host address line HA0 for 8-bit bus mode or HA1 for 16-bit bus mode.
Note: In 16-bit bus mode, the SD1 bit must set to “1” when CMD = 1 during DMA access.
Figure 6. KSZ8851-16MLL 8-Bit and 16-Bit Data Bus Connections
CMD
SD[7:0]
8-bit Data Bus
HD[7:0]
CMD
16-bit Data Bus
HA1
HD[7:0]
HD[15:8]
KSZ8851-16MLL
GND
/RD
/WR
WRN
RDN
/CS
CSN
IRQ
INTRN
/RD
/WR
WRN
RDN
/CS
CSN
IRQ
INTRN
KSZ8851-16MLL
HA0
SD[15:8]
SD[7:0]
SD[15:8]
P1LED1
1
K
ohm
NC
-
A2
A3
A4
A5
A6
A7
-
BE0
BE1
BE2
BE3
CMD=1
“High”
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
CMD=0
“Low”
16-Bit Bus Mode
Pin 1 (P1LED1) = NC or
Pull Up during RESET
A0
A1
A2
A3
A4
A5
A6
A7
GND
D0
D1
D2
D3
D4
D5
D6
D7
GND
SD0
SD1
SD2
SD3
SD4
SD5
SD6
SD7
SD8
SD9
SD10
SD11
SD12
SD13
SD14
SD15
CMD=1
“High”
CMD=0
“Low”
Shared
Data Bus
8-Bit Bus Mode
Pin 1 (P1LED1) = 1K Pull
Down during RESET
-
A2
A3
A4
A5
A6
A7
-
BE0
BE1
BE2
BE3
CMD=1
“High”
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
CMD=0
“Low”
16-Bit Bus Mode
Pin 1 (P1LED1) = NC or
Pull Up during RESET
A0
A1
A2
A3
A4
A5
A6
A7
GND
D0
D1
D2
D3
D4
D5
D6
D7
GND
SD0
SD1
SD2
SD3
SD4
SD5
SD6
SD7
SD8
SD9
SD10
SD11
SD12
SD13
SD14
SD15
CMD=1
“High”
CMD=0
“Low”
Shared
Data Bus
8-Bit Bus Mode
Pin 1 (P1LED1) = 1K Pull
Down during RESET
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| KSZ8851-16MLL-EVAL | 制造商:Micrel Inc 功能描述:BOARD EVALUATION FOR KSZ8851-16MLL |
| KSZ8851-16MLLI | 功能描述:以太网 IC 10/100BT Ethernet MAC + PHY with Generic (8, 16-bit) Bus Interface (I-Temp, Lead Free) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
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