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| 型号： | MCIMX31VMN5CR2 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 532 MHz, MICROPROCESSOR, PBGA473 |
| 封装： | 19 X 19 MM, 0.80 MM PITCH, ROHS COMPLIANT, MAPBGA-473 |
| 文件页数： | 44/122页 |
| 文件大小： | 1418K |
| 代理商： | MCIMX31VMN5CR2 |
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MCIMX31/MCIMX31L Technical Data, Rev. 4.1
28
Freescale Semiconductor
Electrical Characteristics
4.3.5.1
Timing Parameters
In the timing equations, some timing parameters are used. These parameters depend on the implementation
of the ATA interface on silicon, the bus buffer used, the cable delay and cable skew. Table 24 shows ATA
timing parameters.
Table 24. ATA Timing Parameters
Name
Description
Value/
Contributing Factor1
1 Values provided where applicable.
T
Bus clock period (ipg_clk_ata)
peripheral clock
frequency
ti_ds
Set-up time ata_data to ata_iordy edge (UDMA-in only)
UDMA0
UDMA1
UDMA2, UDMA3
UDMA4
UDMA5
15 ns
10 ns
7 ns
5 ns
4 ns
ti_dh
Hold time ata_iordy edge to ata_data (UDMA-in only)
UDMA0, UDMA1, UDMA2, UDMA3, UDMA4
UDMA5
5.0 ns
4.6 ns
tco
Propagation delay bus clock L-to-H to
ata_cs0, ata_cs1, ata_da2, ata_da1, ata_da0, ata_dior, ata_diow, ata_dmack, ata_data,
ata_buffer_en
12.0 ns
tsu
Set-up time ata_data to bus clock L-to-H
8.5 ns
tsui
Set-up time ata_iordy to bus clock H-to-L
8.5 ns
thi
Hold time ata_iordy to bus clock H to L
2.5 ns
tskew1
Max difference in propagation delay bus clock L-to-H to any of following signals
ata_cs0, ata_cs1, ata_da2, ata_da1, ata_da0, ata_dior, ata_diow, ata_dmack, ata_data
(write), ata_buffer_en
7ns
tskew2
Max difference in buffer propagation delay for any of following signals
ata_cs0, ata_cs1, ata_da2, ata_da1, ata_da0, ata_dior, ata_diow, ata_dmack, ata_data
(write), ata_buffer_en
transceiver
tskew3
Max difference in buffer propagation delay for any of following signals ata_iordy, ata_data
(read)
transceiver
tbuf
Max buffer propagation delay
transceiver
tcable1
Cable propagation delay for ata_data
cable
tcable2
Cable propagation delay for control signals ata_dior, ata_diow, ata_iordy, ata_dmack
cable
tskew4
Max difference in cable propagation delay between ata_iordy and ata_data (read)
cable
tskew5
Max difference in cable propagation delay between (ata_dior, ata_diow, ata_dmack) and
ata_cs0, ata_cs1, ata_da2, ata_da1, ata_da0, ata_data(write)
cable
tskew6
Max difference in cable propagation delay without accounting for ground bounce
cable
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
i.MX31
Product
Family
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