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參數(shù)資料
| 型號： | MC9328MX21VMR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 10/100頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU I.MX21 266MHZ 289-MAPBGA |
| 標準包裝： | 1,000 |
| 系列： | i.MX21 |
| 核心處理器： | ARM9 |
| 芯體尺寸： | 32-位 |
| 速度： | 266MHz |
| 連通性： | 1 線，EBI/EMI，I²C，IrDA，MMC，智能卡，SPI，SSI，UART/USART，USB OTG |
| 外圍設備： | DMA，I²S，LCD，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 192 |
| 程序存儲器類型： | ROMless |
| 電壓 - 電源 (Vcc/Vdd)： | 1.45 V ~ 3.3 V |
| 振蕩器型： | 外部 |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 289-LFBGA |
| 包裝： | 帶卷 (TR) |
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Specifications
MC9328MX21 Technical Data, Rev. 3.4
Freescale Semiconductor
17
All timing is measured at 30 pF loading with the exception of fast I/O signals as discussed below. Refer
to the reference manual’s System Control Chapter for details on drive strength settings.
Table 8 provides the maximum loading guidelines that can be tolerated on a memory I/O signal (also
known as Fast I/O) to achieve 133 MHz operation. These critical signals include the SDRAM Clock
(SDCLK), Data Bus signals (D[31:0]), lower order address signals such as A0-A10, MA10, MA11, and
other signals required to meet 133 MHz timing.
The values shown in Table 8 apply over the recommended operating temperature range. Care must be
taken to minimize parasitic capacitance of associated printed circuit board traces.
3.5
DPLL Timing Specifications
Parameters of the DPLL are given in Table 11. In this table, Tref is a reference clock period after the
predivider and Tdck is the output double clock period.
Table 8. Loading Guidelines for Fast IO Signals to Achieve 133 MHz Operation
Drive Strength Setting (DSCR2–DSCR12)
Maximum I/O Loading at 1.8 V
Maximum I/O Loading at 3.0 V
000: 3.5 mA
9 pF
12 pF
001: 4.5 mA
12 pF
16 pF
011: 5.5 mA
15 pF
21 pF
111: 6.5 mA
19 pF
26 pF
Table 9. 32k/26M Oscillator Signal Timing
Parameter
Minimum
RMS
Maximum
Unit
EXTAL32k input jitter (peak to peak) for both System PLL and MCUPLL
–
5
20
ns
EXTAL32k input jitter (peak to peak) for MCUPLL only
–
5
100
ns
EXTAL32k startup time
800
–
ms
Table 10. CLKO Rise/Fall Time (at 30pF Loaded)
Best Case
Typical
Worst Case
Units
Rise Time
0.80
1.00
1.40
ns
Fall Time
0.74
1.08
1.67
ns
Table 11. DPLL Specifications
Parameter
Test Conditions
Minimum
Typical
Maximum
Unit
Reference clock frequency range
Vcc = 1.5V
16
–
320
MHz
Pre-divider output clock frequency
range
Vcc = 1.5V
16
–
32
MHz
Double clock frequency range
Vcc = 1.5V
220
–
560
MHz
Pre-divider factor (PD)
–
1
–
16
–
Total multiplication factor (MF)
Includes both integer and fractional parts
5
–
15
–
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