參數(shù)資料
型號： TMS320AV220PCM
英文描述： Audio/Video Decoder for MPEG
中文描述： 音頻/視頻解碼器的MPEG
文件頁數(shù)： 93/132頁
文件大?。?/td> 1707K
代理商： TMS320AV220PCM
.
.
.
S
–
–
P
–
1
9
SPI MASTER MODE TIMING PARAMETERS
SPI master mode timing information is listed in the following tables.
SPI master mode external timing parameters (clock phase = 0)
(see Figure 40)
NO.
SPI WHEN (SPIBRR + 1) IS EVEN
OR SPIBRR = 0 OR 2
SPI WHEN (SPIBRR + 1)
IS ODD AND SPIBRR > 3
UNIT
MIN
MAX
MIN
MAX
1
tc(SPC)M
Cycle time, SPICLK
4tc(CO)
128tc(CO)
5tc(CO)
127tc(CO)
ns
2
§
tw(SPCH)M
Pulse duration, SPICLK high
(clock polarity = 0)
0.5tc(SPC)M
–
10
0.5tc(SPC)M
0.5tc(SPC)M
–
0.5tc(CO)
–
10
0.5tc(SPC)M
–
0.5tc(CO)
ns
tw(SPCL)M
Pulse duration, SPICLK low
(clock polarity = 1)
0.5tc(SPC)M
–
10
0.5tc(SPC)M
0.5tc(SPC)M
–
0.5tc(CO)
–
10
0.5tc(SPC)M
–
0.5tc(CO)
3
§
tw(SPCL)M
Pulse duration, SPICLK low
(clock polarity = 0)
0.5tc(SPC)M
–
10
0.5tc(SPC)M
0.5tc(SPC)M+0.5tc(CO)
–
10
0.5tc(SPC)M + 0.5tc(CO)
ns
tw(SPCH)M
Pulse duration, SPICLK high
(clock polarity = 1)
0.5tc(SPC)M
–
10
0.5tc(SPC)M
0.5tc(SPC)M+0.5tc(CO)
–
10
0.5tc(SPC)M + 0.5tc(CO)
4
§
td(SPCH-SIMO)M
Delay time, SPICLK high to
SPISIMO valid (clock polarity = 0)
–
10
10
–
10
10
ns
td(SPCL-SIMO)M
Delay time, SPICLK low to
SPISIMO valid (clock polarity = 1)
–
10
10
–
10
10
5
§
tv(SPCL-SIMO)M
Valid time, SPISIMO data valid after
SPICLK low (clock polarity =0)
0.5tc(SPC)M
–
10
0.5tc(SPC)M+0.5tc(CO)
–
10
ns
tv(SPCH-SIMO)M
Valid time, SPISIMO data valid after
SPICLK high (clock polarity =1)
0.5tc(SPC)M
–
10
0.5tc(SPC)M+0.5tc(CO)
–
10
8
§
tsu(SOMI-SPCL)M
Setup time, SPISOMI before
SPICLK low (clock polarity = 0)
0
0
ns
tsu(SOMI-SPCH)M
Setup time, SPISOMI before
SPICLK high (clock polarity = 1)
0
0
9
§
tv(SPCL-SOMI)M
Valid time, SPISOMI data valid after
SPICLK low (clock polarity = 0)
0.25tc(SPC)M
–
10
0.5tc(SPC)M
–
0.5tc(CO)
–
10
ns
tv(SPCH-SOMI)M
Valid time, SPISOMI data valid after
SPICLK high (clock polarity = 1)
0.25tc(SPC)M
–
10
0.5tc(SPC)M
–
0.5tc(CO)
–
10
The MASTER/SLAVE bit (SPICTL.2) is set and the CLOCK PHASE bit (SPICTL.3) is cleared.
tc = system clock cycle time = 1/CLKOUT = tc(CO)
§
The active edge of the SPICLK signal referenced is controlled by the CLOCK POLARITY bit (SPICCR.6).
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