參數(shù)資料
型號(hào): TMS320LC57S
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號(hào)處理
英文描述: Digital Signal Processors(35/50ns指令周期,并行邏輯單元,可編程PLL,全雙工同步串行口的DSP)
中文描述: 數(shù)字信號(hào)處理器(35/50ns指令周期,并行邏輯單元,可編程鎖相環(huán),全雙工同步串行口的數(shù)字信號(hào)處理器)
文件頁數(shù): 73/87頁
文件大?。?/td> 1864K
代理商: TMS320LC57S
TMS320C5x, TMS320LC5x
DIGITAL SIGNAL PROCESSORS
SPRS030A – APRIL 1995 – REVISED APRIL 1996
73
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
SERIAL-PORT TRANSMIT TIMING IN TDM MODE
switching characteristics over recommended operating conditions [H = 0.5t
c(CO)
] (see Figure 26)
PARAMETER
’320C5x-40
’320C5x-57
’320LC5x-40
’320LC5x-50
MIN
’320C5x-80
’320LC5x-80
’320C5x-100
UNIT
MAX
MIN
MAX
MIN
MAX
th(TCH-TDV)
td(TCH-TFV)
td(TC-TDV)
TFRM timing and waveforms shown in Figure 28 are for internal TFRM. TFRM can also be configured as external. The TFRM external case is
illustrated in the receive timing diagram in Figure 27.
Hold time, TDAT/TADD valid after TCLK rising edge
Delay time, TFRM valid after TCLK rising edge
0
0
0
ns
H
3H + 10
H
3H + 7
3H + 5
ns
Delay time, TCLK to valid TDAT/TADD
20
15
12
ns
timing requirements over recommended ranges of supply voltage and operating ambient-air
temperature [H = 0.5t
c(CO)
] (see Figure 26)
’320C5x-40
’320C5x-57
’320LC5x-40
’320LC5x-50
MIN
TYP
5.2H
8H§
’320C5x-80
’320LC5x-80
’320C5x-100
UNIT
MAX
MIN
5.2H
TYP
8H§
MAX
MIN
5.2H
TYP
8H§
MAX
tc(SCK)
tf(SCK)
tr(SCK)
Cycle time, serial-port clock
ns
Fall time, serial-port clock
8#
6#
5#
ns
Rise time, serial-port clock
8#
6#
5#
ns
tw(SCK)
Pulse duration, serial-port clock low/
high
Values ensured by design and are not tested
§When SCK is generated internally
The serial-port design is fully static and, therefore, can operate with tc(SCK) approaching
. It is characterized approaching an input frequency
of 0 Hz but tested as a much higher frequency to minimize test time.
#Values derived from characterization data and not tested
2.1H
2.1H
2.1H
ns
A7
B2
B8
B7
A3
B12
A2
A0
A1
B0
B1
B13
B14
B0
tw(SCK)
tw(SCK)
td(TC-TDV)
th(TCH-TDV)
tr(SCK)
tf(SCK)
td(TCH-TFV)
TFRM
TADD
TDAT
TCLK
B15
tc(SCK)
td(TC-TDV)
th(TCH-TDV)
td(TCH-TFV)
Figure 26. Serial-Port Transmit Timing in TDM Mode
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