参数资料
型号: SM320C50HFGM66
厂商: TEXAS INSTRUMENTS INC
元件分类: 数字信号处理
英文描述: 16-BIT, 66 MHz, OTHER DSP, CQFP132
封装: TIE BAR, CERAMIC, QFP-132
文件页数: 16/35页
文件大小: 536K
代理商: SM320C50HFGM66
SMJ320C50/SMQ320C50
DIGITAL SIGNAL PROCESSOR
SGUS020 – JUNE 1996
23
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
SERIAL-PORT RECEIVE
timing requirements over recommended ranges of supply voltage and operating free-air
temperature [H = 0.5tc(CO)]
PARAMETER
MIN
MAX
UNIT
tc(SCK)
Cycle time, serial-port clock
5.2H
ns
tf(SCK)
Fall time, serial-port clock
8
ns
tr(SCK)
Rise time, serial-port clock
8
ns
tw(SCK)
Pulse duration, serial-port clock low/high
2.1H
ns
tsu(FS-CK)
Setup time, FSR before CLKR falling edge
10
ns
th(CK-FS)
Hold time, FSR after CLKR falling edge
10
ns
tsu(DR-CK)
Setup time, DR before CLKR falling edge
10
ns
th(CK-DR)
Hold time, DR after CLKR falling edge
10
ns
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 at a much higher frequency to minimize test time.
Values derived from characterization data and are not tested.
Bit
DR
FSR
CLKR
8 or 16
(see Note A)
7 or 15
(see Note A)
2
1
tsu(DR-CK)
tsu(FS-CK)
th(CK-FS)
tw(SCK)
tr(SCK)
tf(SCK)
tw(SCK)
th(CK-DR)
tc(SCK)
NOTE A: Depending on whether information is sent in an 8-bit or 16-bit packet.
Figure 14. Serial-Port Receive Timing
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