參數(shù)資料
型號: TMS320C15-25
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: Digital Signal Processors(160ns指令周期,分離的程序和數(shù)據(jù)總線,外部輪詢中斷的DSP)
中文描述: 數(shù)字信號處理器(160ns指令周期,分離的程序和數(shù)據(jù)總線,外部輪詢中斷的數(shù)字信號處理器)
文件頁數(shù): 90/139頁
文件大?。?/td> 1478K
代理商: TMS320C15-25
TMS320C16
DIGITAL SIGNAL PROCESSOR
SPRS009C–JANUARY 1987–REVISED JULY 1991
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
90
design considerations for interfacing to SRAM, EPROM and peripherals
The
C16 differs somewhat from the other members of the
C1x family of digital signal processors (DSPs).
Additional control signals are available for easier interface to external memory or peripherals, and the memory
write cycle timings have been changed.
The discussion here will center around changes in t
v
and its impact upon SRAM, EPROM and
peripherals/latches interfaces.
Access time requirements for interface may be defined relative to :
1.
Valid address (t
a
);
MEN/IOEN, [(t
a(MEN)
];
Figure 11 and the following examples summarize these timings at 35 MHz CLKIN.
2.
tc(C)
tw(CH)
td2
ta(MEN)
td1
ta
tsu(D)
CLKOUT
MEN
A15-A0
D15-D0
ta(CLKOUT)
tf(C)
Figure 11.
where:
t
a
t
a(MEN)
: (access time from address valid) = t
c(C)
– t
d1
– t
su(D)
= 44.3 ns
: (access time from MEN valid) = t
c(C)
– t
d2
– t
su(D)
+ t
d3
= 35.73 ns
and where (for 35 MHz CLKIN):
t
c(C)
= 114.3 ns
t
d1
= 35 ns
t
d2
= [1/4
×
(114.3) + 12] ns
t
su(D)
= 35 ns
t
w(CH)
= 47 ns nominal
t
f(C)
= 8 ns nominal
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