參數(shù)資料
型號(hào): TMX320C6412GNZ
廠商: Texas Instruments, Inc.
英文描述: Signal Processor
中文描述: 信號(hào)處理器
文件頁數(shù): 119/159頁
文件大?。?/td> 1989K
代理商: TMX320C6412GNZ
Programmable Synchronous Interface Timing
119
April 2003 Revised June 2004
SPRS219D
AECLKOUTx
ACEx
ABE[7:0]
AEA[22:3]
AED[63:0]
AARE/ASDCAS/ASADS/
ASRE§
AAOE/ASDRAS/ASOE§
AAWE/ASDWE/ASWE§
The write latency and the length of ACEx assertion are programmable via the SYNCWL and CEEXT fields, respectively, in the EMIFA CE Space
Secondary Control register (CExSEC). In this figure, SYNCWL = 1 and CEEXT = 0.
The following parameters are programmable via the EMIF CE Space Secondary Control register (CExSEC):
Read latency (SYNCRL): 0-, 1-, 2-, or 3-cycle read latency
Write latency (SYNCWL): 0-, 1-, 2-, or 3-cycle write latency
ACEx assertion length (CEEXT): For standard SBSRAM or ZBT SRAM interface, ACEx goes inactive after the final command has been issued
(CEEXT = 0). For synchronous FIFO interface with glue, ACEx is active when ASOE is active (CEEXT = 1).
Function of ASADS/ASRE (RENEN): For standard SBSRAM or ZBT SRAM interface, ASADS/ASRE acts as ASADS with deselect cycles
(RENEN = 0). For FIFO interface, ASADS/ASRE acts as ASRE with NO deselect cycles (RENEN = 1).
Synchronization clock (SNCCLK): Synchronized to AECLKOUT1 or AECLKOUT2
§AARE/ASDCAS/ASADS/ASRE, AAOE/ASDRAS/ASOE, and AAWE/ASDWE/ASWE operate as ASADS/ASRE, AsOE, and ASWE,
respectively, during programmable synchronous interface accesses.
BE1
BE2
BE3
BE4
Q1
Q2
Q3
11
3
12
10
4
2
1
8
5
8
EA1
EA2
10
EA3
EA4
Write
Latency =
1
1
Q4
12
Figure 63. Programmable Synchronous Interface Write Timing for EMIFA
(With Write Latency = 1)
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