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: 18/35页
文件大小: 536K
代理商: SM320C50HFGM66
SMJ320C50/SMQ320C50
DIGITAL SIGNAL PROCESSOR
SGUS020 – JUNE 1996
25
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
SERIAL-PORT TRANSMIT, INTERNAL CLOCKS AND INTERNAL FRAMES
switching characteristics over recommended operating conditions [H = 0.5tc(CO)] (see Note 3)
PARAMETER
MIN
TYP
MAX
UNIT
td(CX-FX)
Delay time, CLKX rising to FSX
25
ns
td(CX-DX)
Delay time, CLKX rising to DX
25
ns
tdis(CX-DX)
Disable time, CLKX rising to DX
40
ns
tc(SCK)
Cycle time, serial-port clock
8H
ns
tf(SCK)
Fall time, serial-port clock
5
ns
tr(SCK)
Rise time, serial-port clock
5
ns
tw(SCK)
Pulse duration, serial-port clock low/high
4H – 20
ns
th(CXH-DXV)
Hold time, DX valid after CLKX high
– 6
ns
Values derived from characterization and not tested.
NOTE 3: Internal clock with external FSX and vice versa are also allowable. However, FSX timings to CLKX are always defined depending on
the source of FSX, and CLKX timings are always dependent upon the source of CLKX. Specifically, the relationship of FSX to CLKX
is independent of the source of CLKX.
DX
Bit
FSX
CLKX
2
1
th(CXH-DXV)
tr(SCK)
tf(SCK)
tw(SCK)
tc(SCK)
td(CX-FX)
td(CX-DX)
tdis(CX-DX)
tw(SCK)
8 or 16
(see Note A)
7 or 15
(see Note A)
NOTE A: Depending on whether information is sent in an 8-bit or 16-bit packet.
Figure 16. Serial-Port Transmit Timing of Internal Clocks and Internal Frames
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