MCIMX257DVM4 Freescale Semiconductor, MCIMX257DVM4 Datasheet - Page 65
MCIMX257DVM4
Manufacturer Part Number
MCIMX257DVM4
Description
IC MPU I.MX25 COMM 400MAPBGA
Manufacturer
Freescale Semiconductor
Series
i.MX25r
Datasheet
1.MCIMX257CJM4.pdf
(154 pages)
Specifications of MCIMX257DVM4
Core Processor
ARM9
Core Size
32-Bit
Speed
400MHz
Connectivity
1-Wire, CAN, EBI/EMI, Ethernet, I²C, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
Peripherals
DMA, I²S, LCD, POR, PWM, WDT
Number Of I /o
128
Program Memory Type
External Program Memory
Ram Size
144K x 8
Voltage - Supply (vcc/vdd)
1.15 V ~ 1.52 V
Data Converters
A/D 3x12b
Oscillator Type
External
Operating Temperature
-20°C ~ 70°C
Package / Case
400-LFBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCIMX257DVM4
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Table 50
slew rate of 2 V/ns.
Freescale Semiconductor
DDR4
DDR5
DDR6
DDR7
Slew Rate (V/Ns)
ID
Command/
Address
0.25
0.15
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
shows values for a command/address slew rate of 1 V/ns and an SDCLK, SDCLK_B differential
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 8
Table 51
CS, RAS, CAS, CKE, WE setup time
CS, RAS, CAS, CKE, WE hold time
Table 50. DDR2 SDRAM Timing Parameter Table (continued)
Table 51. tlS, tlH Derating Values for DDR2-400, DDR2-533
–1450
+187
+179
+167
+150
+125
–110
–175
–285
–350
–525
–800
ΔtlS
+83
–11
–25
–43
–67
Address output setup time
Address output hold time
0
shows additional values for DDR2-400 and DDR2-533.
2.0 V/ns
Parameter
–1125
–125
–188
–292
–375
–500
–708
ΔtlH
+94
+89
+83
+75
+45
+21
–14
–31
–54
–83
0
CK, CK Differential Slew Rate
–1420
+217
+209
+197
+180
+155
+113
–145
–255
–320
–495
–770
ΔtlS
+30
+19
–13
–37
–80
+5
1.5 V/ns
–1095
+124
+119
+113
+105
–158
–262
–345
–470
–678
ΔtlH
+75
+51
+30
+16
–24
–53
–95
–1
Symbol
t
t
t
t
IS
IH
IS
IH
–1390
+247
+239
+227
+210
+185
+143
–115
–225
–290
–465
–740
ΔtlS
+60
+49
+35
+17
–50
–7
1.0 V/ns
0.475
0.475
Min.
0.35
0.35
DDR2-400
–1065
+154
+149
+143
+135
+105
–128
–232
–315
–440
–648
ΔtlH
+81
+60
+46
+29
–23
–65
+6
Max.
—
—
—
—
Units
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
Unit
ns
ns
ns
ns
65
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