参数资料
型号: MCF5251CVM140
厂商: Freescale Semiconductor
文件页数: 31/34页
文件大小: 0K
描述: IC MPU 32BIT 140MHZ 225-MAPBGA
视频文件: ColdFire MCF5251 Automotive Infotainment
标准包装: 160
系列: MCF524x
核心处理器: Coldfire V2
芯体尺寸: 32-位
速度: 140MHz
连通性: ATA,音频,CAN,EBI/EMI,I²C,IDE,MMC/SD,SPI,UART/USART,USB,OTG
外围设备: DMA
程序存储器类型: ROMless
RAM 容量: 128K x 8
电压 - 电源 (Vcc/Vdd): 1.08 V ~ 3.6 V
数据转换器: A/D 6x12b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 225-LFBGA
包装: 托盘
Signal Description
MCF5251 ColdFire Processor Data Sheet: Technical Data, Rev. 3
6
Freescale Semiconductor
3
Signal Description
This chapter describes the MCF5251 input and output signals. The signal descriptions as shown in Table 3
are grouped according to relevant functionality. For additional signal information, see “Chapter 2, Signal
Description” in the MCF5251 reference manual.
UART
Universal
Asynchronous
Receiver
/Transmitter Module
Connectivity
Peripheral
Three UARTs handle asynchronous serial communication.
USBOTG
USB 2.0 High-Speed
On-The-Go
Connectivity
Peripheral
The USB module is used for communication to a PC or communication to
slave devices; for example, to download data from a hard disc player to a
flash player, and to other devices.
Table 3. MCF5251 Signal Index
Signal Name
Mnemonic
Function
Input/
Output
Reset
State
Address
A[24:1]
A[23]/GPO54
24 address lines—address 23 is
multiplexed with GPO54 and
address 24 is multiplexed with A20
(SDRAM access only).
Out
X
Read-write control
RW
Bus write enable—indicates if read
or write cycle in progress.
Out
H
Output enable
OE
Output enable for asynchronous
memories connected to chip selects
Out
negated
Data
D[31:16]
Data bus used to transfer word data
In/Out
Hi-Z
Synchronous row
address strobe
SDRAS/GPIO59
Row address strobe for external
SDRAM
Out
negated
Synchronous column
address strobe
SDCAS/GPIO39
Column address strobe for external
SDRAM
Out
negated
SDRAM write enable
SDWE/GPIO38
Write enable for external SDRAM
Out
negated
SDRAM upper byte
enable
SDUDQM/GPO53
Upper byte enable—indicates during
write cycle if high byte is written.
Out
SDRAM lower byte
enable
SDLDQM/GPO52
Lower byte enable—indicates during
write cycle if low byte is written.
Out
SDRAM chip selects
SD_CS0/GPIO60
SDRAM chip select
In/Out
negated
SDRAM clock enable
BCLKE/GPIO63
SDRAM clock enable
Out
System clock
BCLK/GPIO40
SDRAM clock output
In/Out
Table 2. Digital and Analog Modules (continued)
Block
Mnemonic
Block Name
Functional
Grouping
Brief Description
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