參數(shù)資料
型號(hào): TMS370C769AFNT
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁(yè)數(shù): 42/48頁(yè)
文件大?。?/td> 711K
代理商: TMS370C769AFNT
TMS370Cx36
8-BIT MICROCONTROLLER
SPNS039B – JANUARY 1996 – REVISED FEBRUARY 1997
42
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
SPI master mode external timing characteristics and requirements (see Note 11 and Figure 20)
NO.
MIN
MAX
UNIT
38
tc(SPC)M
tw(SPCL)M
tw(SPCH)M
td(SPCL-SIMOV)M
tv(SPCH-SIMO)M
tsu(SOMI-SPCH)M
Cycle time, SPICLK
2tc
tc– 45
tc– 55
– 65
256tc
ns
39
Pulse duration, SPICLK low
0.5tc(SPC)+45
0.5tc(SPC)+45
50
ns
40
Pulse duration, SPICLK high
ns
41
Delay time, SPISIMO valid after SPICLK low (polarity = 1)
ns
42
Valid time, SPISIMO data valid after SPICLK high (polarity =1)
tw(SPCH) – 50
0.25 tc + 150
ns
43
Setup time, SPISOMI to SPICLK high (polarity = 1)
ns
44
tv(SPCH-SOMI)M
Valid time, SPISOMI data valid after SPICLK high
(polarity = 1)
0
ns
NOTE 11: tc = system clock cycle time = 1/SYSCLK
Data Valid
Data Valid
SPISOMI
SPISIMO
SPICLK
44
43
42
41
38
40
39
The diagram is for polarity = 1. SPICLK is inverted when polarity = 0.
Figure 20. SPI Master External Timing
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