參數(shù)資料
型號(hào): TMX320C6414TGLZ
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號(hào)處理
英文描述: FIXED-POINT DIGITAL SIGNAL PROCESSORS
中文描述: 定點(diǎn)數(shù)字信號(hào)處理器
文件頁數(shù): 92/140頁
文件大?。?/td> 2033K
代理商: TMX320C6414TGLZ
SPRS226H NOVEMBER 2003 REVISED AUGUST 2005
92
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
PROGRAMMABLE SYNCHRONOUS INTERFACE TIMING (CONTINUED)
ECLKOUTx
CEx
ABE[7:0] or BBE[1:0]
AEA[22:3] or BEA[20:1]
AED[63:0] or BED[15:0]
ARE/SDCAS/SADS/SRE
AOE/SDRAS/SOE
AWE/SDWE/SWE
BE1
BE2
BE3
BE4
Q1
Q2
Q3
Q4
12
11
3
1
12
10
4
2
1
8
5
8
EA1
EA2
EA3
EA4
10
These C64x
devices have two EMIFs (EMIFA and EMIFB). All EMIFA signals are prefixed by an “A” and all EMIFB signals are prefixed by a
“B”. Throughout the rest of this document, in generic EMIF areas of discussion, the prefix “A” or “B” may be omitted [e.g., the programmable
synchronous interface access signals are shown as generic (SADS/SRE, SOE, and SWE) instead of ASADS/ASRE, ASOE, and ASWE (for
EMIFA) and BSADS/BSRE, BSOE, and BSWE (for EMIFB)].
The write latency and the length of CEx assertion are programmable via the SYNCWL and CEEXT fields, respectively, in the EMIFx CE Space
Secondary Control register (CExSEC). In this figure, SYNCWL = 0 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
CEx assertion length (CEEXT): For standard SBSRAM or ZBT SRAM interface, CEx goes inactive after the final command has been issued
(CEEXT = 0). For synchronous FIFO interface with glue, CEx is active when SOE is active (CEEXT = 1).
Function of SADS/SRE (RENEN): For standard SBSRAM or ZBT SRAM interface, SADS/SRE acts as SADS with deselect cycles
(RENEN = 0). For FIFO interface, SADS/SRE acts as SRE with NO deselect cycles (RENEN = 1).
Synchronization clock (SNCCLK): Synchronized to ECLKOUT1 or ECLKOUT2
ARE/SDCAS/SADS/SRE, AOE/SDRAS/SOE, and AWE/SDWE/SWE operate as SADS/SRE, SOE, and SWE, respectively, during
programmable synchronous interface accesses.
Figure 25. Programmable Synchronous Interface Write Timing for EMIFA and EMIFB
(With Write Latency = 0)
§
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