参数资料
型号: MCF51JE128CLK
厂商: Freescale Semiconductor
文件页数: 26/47页
文件大小: 0K
描述: IC MCU 128K COLDF 80-LQFP
标准包装: 480
系列: MCF51JE
核心处理器: Coldfire V1
芯体尺寸: 32-位
速度: 50MHz
连通性: CAN,EBI/EMI,I²C,SCI,SPI,USB OTG
外围设备: LVD,PWM,WDT
输入/输出数: 47
程序存储器容量: 128KB(128K x 8)
程序存储器类型: 闪存
RAM 容量: 32K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 3.6 V
数据转换器: A/D 12x12b,D/A 1x12b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 80-LQFP
包装: 托盘
MCF51JE256 Datasheet, Rev. 4
Preliminary Electrical Characteristics
Freescale Semiconductor
32
3.11
Mini-FlexBus Timing Specifications
A multi-function external bus interface called Mini-FlexBus is provided with basic functionality to
interface to slave-only devices up to a maximum bus frequency of 25.1666 MHz. It can be directly connected
to asynchronous or synchronous devices such as external boot ROMs, flash memories, gate-array logic, or
other simple target (slave) devices with little or no additional circuitry. For asynchronous devices, a simple
chip-select based interface can be used.
All processor bus timings are synchronous; that is, input setup/hold and output delay are given in respect
to the rising edge of a reference clock, MB_CLK. The MB_CLK frequency is half the internal system bus
frequency.
The following timing numbers indicate when data is latched or driven onto the external bus, relative to the
Mini-FlexBus output clock (MB_CLK). All other timing relationships can be derived from these values.
Table 19. Mini-FlexBus AC Timing Specifications
#
Characteristic
Symbol
Min
Max
Unit
C
1
Frequency of Operation
25.1666
MHz
2
Clock Period
MB1
39.73
ns
D
3
Output Valid1
1
Specification is valid for all MB_A[19:0], MB_D[7:0], MB_CS[1:0], MB_OE, MB_R/W, and MB_ALE.
MB2
20
ns
T
4
Output Hold1
MB3
1.0
ns
D
5
Input Setup2
2
Specification is valid for all MB_D[7:0].
MB4
22
ns
T
6
Input Hold2
MB5
10
ns
D
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