參數(shù)資料
型號: MNSC140CORE
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
元件分類: 數(shù)字信號處理
英文描述: Quad Core 16-Bit Digital Signal Processor
中文描述: 四核16位數(shù)字信號處理器
文件頁數(shù): 49/88頁
文件大小: 983K
代理商: MNSC140CORE
AC Timings
MSC8122 Technical Data, Rev. 13
Freescale Semiconductor
2-15
2.5.5.3 DMA Data Transfers
Table 2-16
describes the DMA signal timing.
The DREQ
signal is synchronized with
REFCLK
. To achieve fast response, a synchronized peripheral should assert
DREQ
according to the timings in
Table 2-16
.
Figure 2-7
shows synchronous peripheral interaction.
Table 2-16.
DMA Signals
No.
Characteristic
Ref = CLKIN
Ref = CLKOUT
(1.2 V only)
Units
Min
Max
Min
Max
37
38
39
40
41
DREQ set-up time before the 50% level of the falling edge of REFCLK
DREQ hold time after the 50% level of the falling edge of REFCLK
DONE set-up time before the 50% level of the rising edge of REFCLK
DONE hold time after the 50% level of the rising edge of REFCLK
DACK/DRACK/DONE delay after the 50% level of the REFCLK rising edge
5.0
0.5
5.0
0.5
0.5
7.5
5.0
0.5
5.0
0.5
0.5
8.4
ns
ns
ns
ns
ns
Figure 2-7.
DMA Signals
REFCLK
DREQ
DONE
DACK/DONE/DRACK
37
38
40
39
41
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