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参数资料
| 型号： | MC94MX21DVKN3R2 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 350 MHz, MICROPROCESSOR, PBGA289 |
| 封装： | 14 X 14 MM, 1.41 MM HEIGHT, 0.65 MM PITCH, LEAD FREE, PLASTIC, BGA-289 |
| 文件页数： | 16/98页 |
| 文件大小： | 1326K |
| 代理商： | MC94MX21DVKN3R2 |
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Specifications
MC94MX21 Technical Data, Rev. 1.
5
Freescale Semiconductor
23
Figure 8. BMI Drives Clock, MMD Read BMI Timing
(MASTER_MODE_SEL=0, MMD_MODE_SEL=1, MMD_CLKOUT=1)
Note: In this mode, the max frequency of the BMI_CLK/CS can be up to 36MHz (double as max data pad speed).
Note: The BMI_CLK/CS can only be divided by 2,4,8,16 from HCLK.
3.8.1.4
MMD Write BMI Timing
Figure 9 shows the MMD write BMI timing when BMI drives BMI_CLK/CS.
When the BMI_WRITE signal is asserted, the BMI can write a 1 to READ bit of control register to issue
a WRITE cycle. This bit is cleared automatically when the WRITE operation is completed. In a WRITE
burst the MMD will write COUNT+1 data to the BMI. The user can issue another WRITE operation if the
MMD still has data to write after the first operation completed.
The BMI can latch the data either at falling edge or the next rising edge of the BMI_CLK/CS according to
the DATA_LATCH bit. When the DATA_LATCH bit is set, the BMI latch data at the next rising edge and
latch the last data using the internal clock.
BMI_WRITE signal can not be negated when the WRITE operation is proceeding.
Table 15. MMD Read BMI Timing Table when BMI Drives Clock
Item
Symbol
Minimum
Typical
Maximum
Unit
Transfer data setup time
Tds
2
–
8
ns
Transfer data hold time
Tdh
2
–
8
ns
Read_req hold time
Trh
2
–
18
ns
BMI_CLK/CS
BMI_READ_REQ
BMI_WRITE
BMI_D[15:0]
TxD1
TxD2
Last TxD
1T
Tds
Trh
DMA or CPU write data to TxFIFO
Tdh
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:
MC94MX21DVKN3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC94MX21DVKN3R2 | 制造商:Freescale Semiconductor 功能描述:32-bit Embedded Microprocessors |
| MC950 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:INTEGRATED CIRCUITS |
| MC951 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:INTEGRATED CIRCUITS |
| MC952 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:INTEGRATED CIRCUITS |
| MC953 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:INTEGRATED CIRCUITS |
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