參數(shù)資料
型號: MCIMX258CVM4
廠商: Freescale Semiconductor
文件頁數(shù): 114/153頁
文件大小: 0K
描述: IC MPU I.MX25 IND 400MAPBGA
標(biāo)準(zhǔn)包裝: 90
系列: i.MX25
核心處理器: ARM9
芯體尺寸: 32-位
速度: 400MHz
連通性: 1 線,CAN,EBI/EMI,以太網(wǎng),I²C,MMC,智能卡,SPI,SSI,UART/USART,USB OTG
外圍設(shè)備: DMA,I²S,LCD,POR,PWM,WDT
輸入/輸出數(shù): 128
程序存儲器類型: 外部程序存儲器
RAM 容量: 144K x 8
電壓 - 電源 (Vcc/Vdd): 1.15 V ~ 1.52 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 3x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 400-LFBGA
包裝: 托盤
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 10
Freescale Semiconductor
63
Table 50 shows values for a command/address slew rate of 1 V/ns and an SDCLK, SDCLK_B differential
slew rate of 2 V/ns. Table 51 shows additional values for DDR2-400 and DDR2-533.
DDR4
CS, RAS, CAS, CKE, WE setup time
tIS
1.2
ns
DDR5
CS, RAS, CAS, CKE, WE hold time
tIH
1.2
ns
DDR6
Address output setup time
tIS
1.2
ns
DDR7
Address output hold time
tIH
0.475
ns
Table 51. tlS, tlH Derating Values for DDR2-400, DDR2-533
Command/
Address
Slew Rate (V/Ns)
CK, CK Differential Slew Rate
Units
2.0 V/ns
1.5 V/ns
1.0 V/ns
ΔtlS
ΔtlH
ΔtlS
ΔtlH
ΔtlS
ΔtlH
4.0
+187
+94
+217
+124
+247
+154
ps
3.5
+179
+89
+209
+119
+239
+149
ps
3.0
+167
+83
+197
+113
+227
+143
ps
2.5
+150
+75
+180
+105
+210
+135
ps
2.0
+125
+45
+155
+75
+185
+105
ps
1.5
+83
+21
+113
+51
+143
+81
ps
1.0
0
+30
+60
ps
0.9
–11
–14
+19
+16
+49
+46
ps
0.8
–25
–31
+5
–1
+35
+29
ps
0.7
–43
–54
–13
–24
+17
+6
ps
0.6
–67
–83
–37
–53
–7
–23
ps
0.5
–110
–125
–80
–95
–50
–65
ps
0.4
–175
–188
–145
–158
–115
–128
ps
0.3
–285
–292
–255
–262
–225
–232
ps
0.25
–350
–375
–320
–345
–290
–315
ps
0.2
–525
–500
–495
–470
–465
–440
ps
0.15
–800
–708
–770
–678
–740
–648
ps
0.1
–1450
–1125
–1420
–1095
–1390
–1065
ps
Table 50. DDR2 SDRAM Timing Parameter Table (continued)
ID
Parameter
Symbol
DDR2-400
Unit
Min.
Max.
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