参数资料
型号: MC9328MXSCVF10R2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 100 MHz, MICROPROCESSOR, PBGA225
封装: 13 X 13 MM, PLASTIC, BGA-225
文件页数: 15/72页
文件大小: 1411K
代理商: MC9328MXSCVF10R2
MC9328MXS Advance Information, Rev. 0
22
Freescale Semiconductor
Specifications
3.9.2.4 DTACK Write Cycle DMA Enabled
Figure 9. DTACK Write Cycle DMA Enabled
Table 16. Write Cycle DMA Enabled: WSC = 111111, DTACK_SEL=0, HCLK=96MHz
Number
Characteristic
3.0 ± 0.3 V
Unit
Minimum
Maximum
1CS5 assertion time
See note 3
ns
2EB assertion time
See note 3
ns
3CS5 pulse width
3T
ns
4RW negated before CS5 is negated
1.5T-2.44
1.5T-0.8
ns
5
Address inactive after CS negated
0.3
ns
6DTACK asserted after CS5 asserted
1019T
ns
7DTACK asserted to RW negated
2T+2.37
3T+6.6
ns
8
Data hold timing after RW negated
1.5T-3.99
ns
9
Data ready after CS5 is asserted
T
ns
10
CS deactive to next CS active
T
ns
11
EB negate after CS negate
0.5T
0.5T+0.5
ns
12
DTACK pulse width
1T
3T
ns
Note:
1. DTACK asserted means DTACK becomes low level.
2. T is the system clock period. (For 96 MHz system clock, T=10.42 ns)
3. CS5 assertion can be controlled by CSA bits. EB assertion also can be programmed by WEA bits in the CS5L register.
4. Address becomes valid and RW asserts at the start of write access cycle.
5.The external DTACK input requirement is eliminated when CS5 is programmed to use internal wait state.
OE
DTACK
Address
EB
CS5
RW
(logic high)
programmable
min 0ns
programmable
min 0ns
(output to i.MX)
3
8
5
4
6
10
7
11
12
1
2
9
DATABUS
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