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參數(shù)資料
| 型號(hào)： | MCF5485CZP200 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 7/34頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MPU 32BIT COLDF 388-PBGA |
| 標(biāo)準(zhǔn)包裝： | 40 |
| 系列： | MCF548x |
| 核心處理器： | Coldfire V4E |
| 芯體尺寸： | 32-位 |
| 速度： | 200MHz |
| 連通性： | CAN，EBI/EMI，以太網(wǎng)，I²C，SPI，UART/USART，USB |
| 外圍設(shè)備： | DMA，PWM，WDT |
| 輸入/輸出數(shù)： | 99 |
| 程序存儲(chǔ)器類型： | ROMless |
| RAM 容量： | 32K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 1.43 V ~ 1.58 V |
| 振蕩器型： | 外部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 388-BBGA |
| 包裝： | 托盤 |
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SDRAM Bus
MCF548x ColdFire Microprocessor, Rev. 4
Freescale Semiconductor
15
Figure 12. FlexBus Write Timing
9
SDRAM Bus
The SDRAM controller supports accesses to main SDRAM memory from any internal master. It supports standard SDRAM or
double data rate (DDR) SDRAM, but it does not support both at the same time. The SDRAM controller uses SSTL2 and SSTL3
I/O drivers. Both SSTL drive modes are programmable for Class I or Class II drive strength.
9.1
SDR SDRAM AC Timing Characteristics
The following timing numbers indicate when data is latched or driven onto the external bus, relative to the memory bus clock,
when operating in SDR mode on write cycles and relative to SDR_DQS on read cycles. The MCF548x SDRAM controller is a
DDR controller that has an SDR mode. Because it is designed to support DDR, a DQS pulse must be supplied to the MCF548x
for each data beat of an SDR read. The MCF548x accomplishes this by asserting a signal called SDR_DQS during read cycles.
Care must be taken during board design to adhere to the following guidelines and specs with regard to the SDR_DQS signal
and its usage.
CLKIN
AD[X:0]
AD[31:Y]
R/W
ALE
TSIZ[1:0]
FBCSn, BE/BWEn
TA
FB1
A[X:0]
A[31:Y]
DATA
FB2
FB3
TSIZ[1:0]
FB3
FB6
FB7
OE
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCF548X | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:MCF548x ColdFire㈢ Microprocessor |
| MCF548X_07 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:MCF548x ColdFire㈢ Microprocessor |
| MCF-800 STYLO | 制造商:Henkel Corporation / Multicore 功能描述:CLEANER, MCF-800, PENCIL |
| MCF-B1805F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Chassis Mounting Transformers |
| MCFC101 | 制造商:SPC Multicomp 功能描述:FUSE CLIP 1"/1.1/4" PK100 |
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