參數(shù)資料
型號(hào): L64381
廠商: LSI Corporation
英文描述: 4-Port Ethernet Controller(四端口以太網(wǎng)控制器)
中文描述: 4端口以太網(wǎng)控制器(四端口以太網(wǎng)控制器)
文件頁(yè)數(shù): 72/109頁(yè)
文件大?。?/td> 815K
代理商: L64381
4-16
L64381 Operation
Figure 4.12 shows the timing relationship for read accesses.
Figure 4.12
Processor Read
Timing
4.4.2
Writing the
L64381 Internal
Registers
To write the internal registers of the L64381, the processor asserts the
CHIP_SELECT and ADRS_STROBE signals and deasserts the READ
signal. When the L64381 detects both ADRS_STROBE and
CHIP_SELECT asserted, then on the next rising edge of CLOCK, it
latches in the address from the ADRS[5:0] inputs, and latches in the
instruction type from the READ input. The L64381 asserts the PREADY
signal for one cycle after it has latched in the data on PDATA[15:0].
Figure 4.13 shows the timing relationship for write accesses.
Figure 4.13
Processor Write
Timing
ADRS_STROBE
PDATA[15:0]
ADRS[5:0]
READ
CHIP_SELECT
PREADY
CLOCK
ADR
DATA
ADRS_STROBE
PDATA[15:0]
ADRS[5:0]
READ
CHIP_SELECT
PREADY
CLOCK
ADR
DATA
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