參數(shù)資料
型號: MC9328MX21VMR2
廠商: Freescale Semiconductor
文件頁數(shù): 15/100頁
文件大小: 0K
描述: IC MCU I.MX21 266MHZ 289-MAPBGA
標(biāo)準(zhǔn)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(shè)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)
Specifications
MC9328MX21 Technical Data, Rev. 3.4
Freescale Semiconductor
21
3.8
BMI Interface Timing Diagram
3.8.1
Connecting BMI to ATI MMD Devices
3.8.1.1
ATI MMD Devices Drive the BMI_CLK/CS
In this mode MMD_MODE_SEL bit is set and MMD_CLKOUT bit is cleared. BMI_WRITE and
BMI_CLK/CS are input signals to BMI driving by ATI MMD chip set. Output signal BMI_READ_REQ
can be used as interrupt signal to inform MMD that data is ready in BMI TxFIFO for read access. MMD
can write data to BMI RxFIFO anytime as CPU or DMA can move data out from RxFIFO much faster
than the BMI interface. Overflow interrupt is generated if RxFIFO overflow is detected. Once this
happens, the new coming data is ignored.
3.8.1.1.1
MMD Read BMI Timing
Figure 6 shows the MMD read BMI timing when the MMD drives clock.
On each rising edge of BMI_CLK/CS BMI checks the BMI_WRITE logic level to determine if the current
cycle is a read cycle. It puts data into the data bus and enables the data out on the rising edge of BMI_CLK/
CS if BMI_WRITE is logic high. The BMI_READ_REQ is negated one hclk cycle after the BMI_CLK/
CS rising edge of last data read. The MMD cannot issues read command when BMI_READ_REQ is low
(no data in TxFIFO).
Table 13. DMA External Request and Grant Timing Parameters
Parameter
Description
3.0 V
1.8 V
Unit
WCS
BCS
WCS
BCS
tmin_assert
Minimum assertion time of External Grant
signal
8 hclk + 8.6
8 hclk + 2.74 8 hclk + 7.17 8 hclk + 3.25
ns
tmax_req_assert Maximum External request assertion time
after assertion of Grant signal
9 hclk - 20.66
9 hclk - 6.7
9 hclk - 17.96 9 hclk - 8.16
ns
tmax_read
Maximum External request assertion time
after first read completion
8 hclk - 6.21
8 hclk - 0.77
8 hclk - 5.84
8 hclk - 0.66
ns
tmax_write
Maximum External request assertion time
after completion of first write
3 hclk - 15.87 3 hclk - 8.83
3 hclk - 15.9
3 hclk - 9.12
ns
相關(guān)PDF資料
PDF描述
MC9328MX21DVMR2 IC MCU I.MX21 266MHZ 289-MAPBGA
S912XDT256F1MAL IC MCU FLASH 112-LQFP
MC9328MX21DVM IC MCU I.MX21 266MHZ 289-MAPBGA
MC9328MX21VM IC MCU I.MX21 266MHZ 289-MAPBGA
MCIMX357DJQ5CR2 MULTIMEDIA PROCESSOR 400-MAPBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC9328MXL 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:MX Family of applications processors
MC9328MXL/D 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:i.MX Integrated Portable System Processor
MC9328MXL_06 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:MX Family of applications processors
MC9328MXLCVF15 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:i.MX Integrated Portable System Processor
MC9328MXLCVH15 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:i.MX Integrated Portable System Processor