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参数资料
| 型号： | MCF5235CVM150 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 150 MHz, RISC PROCESSOR, PBGA256 |
| 封装： | MAPBGA-256 |
| 文件页数： | 28/76页 |
| 文件大小： | 2665K |
| 代理商： | MCF5235CVM150 |
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34
MCF523x Integrated Microprocessor Hardware Specifications
MOTOROLA
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Interface Recommendations
4.7.1.2
Address Multiplexing
Table 21 shows the generic address multiplexing scheme for SDRAM configurations. All possible address
connection configurations can be derived from this table.
Table 20. Synchronous DRAM Signal Connections
Signal
Description
SD_RAS
Synchronous row address strobe. Indicates a valid SDRAM row address is present and can be
latched by the SDRAM. SD_RAS should be connected to the corresponding SDRAM SD_RAS.
Do not confuse SD_RAS with the DRAM controller’s SD_CS[1:0], which should not be
interfaced to the SDRAM SD_RAS signals.
SD_CAS
Synchronous column address strobe. Indicates a valid column address is present and can be
latched by the SDRAM. SD_CAS should be connected to the corresponding signal labeled
SD_CAS on the SDRAM.
DRAMW
DRAM read/write. Asserted for write operations and negated for read operations.
SD_CS[1:0]
Row address strobe. Select each memory block of SDRAMs connected to the MCF523x. One
SD_CS signal selects one SDRAM block and connects to the corresponding CS signals.
SD_CKE
Synchronous DRAM clock enable. Connected directly to the CKE (clock enable) signal of
SDRAMs. Enables and disables the clock internal to SDRAM. When CKE is low, memory can
enter a power-down mode where operations are suspended or they can enter self-refresh
mode. SD_CKE functionality is controlled by DCR[COC]. For designs using external
multiplexing, setting COC allows SD_CKE to provide command-bit functionality.
BS[3:0]
Column address strobe. For synchronous operation, BS[3:0] function as byte enables to the
SDRAMs. They connect to the DQM signals (or mask qualifiers) of the SDRAMs.
CLKOUT
Bus clock output. Connects to the CLK input of SDRAMs.
Table 21. Generic Address Multiplexing Scheme
Address Pin Row Address Column Address
Notes Related to Port Sizes
17
0
8-bit port only
16
1
8- and 16-bit ports only
15
2
14
3
13
4
12
5
11
6
10
7
9
8
17
16
32-bit port only
18
17
16-bit port only or 32-bit port with only 8
column address lines
19
18
16-bit port only when at least 9 column
address lines are used
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCF5235CVM150 | 制造商:Freescale Semiconductor 功能描述:Microprocessor IC |
| MCF5235CVM150J | 功能描述:32位微控制器 - MCU V2CORE 64KSRAM RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| MCF5235CVM150J | 制造商:Freescale Semiconductor 功能描述:IC 32-BIT MPU 150 MHz 256-BGA |
| MCF5235EC | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Microprocessor Hardware Specification |
| MCF523X | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Microprocessor Hardware Specification |
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