参数资料
型号: DSPB56364AF100
厂商: Freescale Semiconductor
文件页数: 80/148页
文件大小: 0K
描述: IC DSP 24BIT AUD 100MHZ 100-LQFP
标准包装: 90
系列: DSP56K/Symphony
类型: 音频处理器
接口: 主机接口,I²C,SAI,SPI
时钟速率: 100MHz
非易失内存: ROM(24 kB)
芯片上RAM: 11.25kB
电压 - 输入/输出: 3.30V
电压 - 核心: 3.30V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 100-LQFP
供应商设备封装: 100-LQFP(14x14)
包装: 托盘
External Memory Expansion Port (Port A)
DSP56364 Technical Data, Rev. 4.1
Freescale Semiconductor
3-21
147
Last WR assertion to RAS deassertion
tRWL
2.75
× T
C 4.3
33.4
26.8
ns
148
WR assertion to CAS deassertion
tCWL
2.5
× T
C 4.3
33.6
27.0
ns
149
Data valid to CAS assertion (write)
tDS
0.25
× T
C 3.7
0.1
ns
0.25
× T
C 3.0
0.1
ns
150
CAS assertion to data not valid (write)
tDH
1.75
× T
C 4.0
22.5
17.9
ns
151
WR assertion to CAS assertion
tWCS
TC 4.3
10.9
8.2
ns
152
Last RD assertion to RAS deassertion
tROH
2.5
× T
C 4.0
33.9
27.3
ns
153
RD assertion to data valid
tGA
1.75
× T
C 7.5
19.0
ns
1.75
× T
C 6.5
15.4
ns
154
RD deassertion to data not valid7
tGZ
0.0
0.0
ns
155
WR assertion to data active
0.75
× T
C 0.3
11.1
9.1
ns
156
WR deassertion to data high impedance
0.25
× T
C
3.8
3.1
ns
1 The number of wait states for Page mode access is specified in the DCR.
2 The refresh period is specified in the DCR.
3 The asynchronous delays specified in the expressions are valid for DSP56364.
4 There are no DRAMs fast enough to fit to two wait states Page mode @ 100 MHz (See
5 All the timings are calculated for the worst case. Some of the timings are better for specific cases (e.g., t
PC equals 3 × TC for
read-after-read or write-after-write sequences).
6 BRW[1:0] (DRAM Control Register bits) defines the number of wait states that should be inserted in each DRAM out-of-page
access.
7 RD deassertion will always occur after CAS deassertion; therefore, the restricted timing is t
OFF and not tGZ.
Table 3-10 DRAM Page Mode Timings, Two Wait States1, 2, 3, 4 (continued)
No.
Characteristics
Symbol
Expression5
66 MHz
80 MHz
Unit
Min
Max
Min
Max
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