MCIMX251AJM4 Freescale Semiconductor, MCIMX251AJM4 Datasheet - Page 65

• Manufacturer Part Number: MCIMX251AJM4
• Description: IC MPU IMX25 AUTO 400MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX25r

Specifications of MCIMX251AJM4

• 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, 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: -40°C ~ 85°C
• Package / Case: 400-MAPBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

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
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
i.MX25 Applications Processor for Automotive Products, Rev. 8
+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