IAR-KSK-IMX25 Freescale Semiconductor, IAR-KSK-IMX25 Datasheet - Page 114

• Manufacturer Part Number: IAR-KSK-IMX25
• Description: KIT DEVELOPMENT I.MX257, ARM926
• Manufacturer: Freescale Semiconductor
• Series: i.MX25r
• Type: MCUr

Specifications of IAR-KSK-IMX25

• Contents: Board, Cables, CD, Debugger, Power Supply
• Processor To Be Evaluated: I.MX257
• Processor Series: i.MX25
• Data Bus Width: 16 bit
• Interface Type: UART, JTAG, USB, Ethernet, SD/MMC
• Core: ARM926EJ-S
• Silicon Manufacturer: Freescale
• Core Architecture: ARM
• Core Sub-architecture: ARM9
• Silicon Core Number: I.MX2
• Silicon Family Name: I.MX25
• Mcu Supported Families: I.MX25
• For Use With/related Products: i.MX25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 83
shows the timing for ADC normal operation.
Figure 83. Timing for ADC Normal Operation
When the ADC is used so that the idle clock cycles occur between conversions (due to the negation of soc),
the selin inputs must be stable at least 1 clock cycle before the clock's rising edge where the soc signal is
latched. Also, selrefp and selrefn must be stable by the time the soc signal is latched. These conditions are
met if enadc=1 and reset=0 throughout ADC operation, including the idle cycles. If the conditions are not
met, or if power is lost during ADC operation, then a new start-up sequence is required for ADC to become
operational again.
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 8
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Freescale Semiconductor