參數(shù)資料
型號(hào): SE370C792yyz
廠商: Texas Instruments, Inc.
英文描述: TMS370 MICROCONTROLLER FAMILY DATA BOOK
中文描述: TMS370微控制器系列數(shù)據(jù)手冊(cè)
文件頁(yè)數(shù): 33/78頁(yè)
文件大?。?/td> 919K
代理商: SE370C792YYZ
TIMING CONVENTIONS
1–25
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
setup time
The time interval between the application of a signal at a specified input terminal and a subsequent active
transition at another specified input terminal.
NOTES:
1. The setup time is the actual time interval between two signal events and is determined by the system in which the digital circuit
operates. A minimum value is specified that is the shortest interval for which correct operation of the digital circuit is assured.
2. The setup time can have a negative value in which case the minimum limit defines the longest interval (between the active
transition and the application of the other signal) for which correct operation of the digital circuit is assured.
Example symbology:
Classified
t
su(D)
t
su(WT-SCH)
t
su(RXD-SCCH)
t
su(SOMI-SPCH)
t
su(SIMO-SPCH)
t
su(S)
transition times (rise and fall times)
Description
Setup time, write data time to EDS high
Setup time, WAIT time to SYSCLK high
Setup time, SCIRXD to SCICLK high
Setup time, SPISOMI to SPICLK high (polarity = 1)
Setup time, SPISIMO to SPICLK high (polarity = 1)
Setup time, analog to sample command
The time interval between two reference points (10% and 90% unless otherwise specified) on the same
waveform that is changing from the defined low level to the defined high level (rise time) or from the defined high
level to the defined low level (fall time).
Example symbology:
Classified
t
r
t
f
t
r(CI)
t
f(CI)
valid time
Description
Rise time
Fall time
Rise time, XTAL2/CLKIN
Fall time, XTAL2/CLKIN
General. The time interval during which a signal is (or should be) valid.
Output data-valid time. The time interval in which output data continues to be valid following a change of
input conditions that could cause the output data to change at the end of the interval.
Example symbology:
Classified
t
v(A)
t
v(SCCH-TXD)
t
v(SCCH-RXD)
t
v(SPCH-SOMI)
t
v(SPCH-SIMO)
t
v(AB-CD)
supersedes the older form t
PVX
.
Description
Valid time, address to EDS, CSE1, CSE2, CSH1, CSH2, CSH3 and CSPF low
Valid time, SCITXD data valid after SCICLK high
Valid time, SCIRXD data valid after SCICLK high
Valid time, SPISOMI data valid after SPICLK high (polarity = 1)
Valid time, SPISIMO data valid after SPICLK high (polarity = 1)
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