参数资料
型号: MCF54418CMJ250
厂商: Freescale Semiconductor
文件页数: 18/61页
文件大小: 0K
描述: IC MCU 32BIT 256MAPBGA
标准包装: 450
系列: MCF5441x
核心处理器: Coldfire V4
芯体尺寸: 32-位
速度: 250MHz
连通性: 1 线,CAN,EBI/EMI,以太网,I²C,智能卡,SPI,SSI,UART/USART,USB,USB OTG
外围设备: DMA,PWM,WDT
输入/输出数: 87
程序存储器类型: ROMless
RAM 容量: 64K x 8
电压 - 电源 (Vcc/Vdd): 1.14 V ~ 1.32 V
数据转换器: A/D 8x12b,D/A 2x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 256-LBGA
包装: 托盘
Electrical characteristics
MCF5441x ColdFire Microprocessor Data Sheet, Rev. 8
Freescale Semiconductor
25
4.6
Output pad loading and slew rate
The output pins on the MCF5441x devices have programmable slew rates. Table 12 lists the rise/fall time for pins based on the
type of pad used for the signal, the value programmed into the appropriate field of the slew rate control registers, and capacitive
loading. Refer to Table 5 for a list of the external signals to pad connections.
NOTE
To allow the I/O interfaces to run at their maximum frequency, set their respective slew rate
select values to 11.
Weak internal pull-up/pull-down device current1
IAPU
10
315
A
Selectable weak internal pull-up/pull-down device current1
IAPU
25
150
A
Input capacitance 2
All input-only pins
All input/output (three-state) pins
Cin
7
pF
Output loading for CMOS pads (EVDD and FBVDD domains)
Low drive
High drive
CL
50
200
pF
Output loading for SDRAMC pads (SDVDD domain)
Low drive
High drive
CL
5
50
pF
1
Refer to the signals section for pins having weak internal pull-up devices.
2
This parameter is characterized before qualification rather than 100% tested.
Table 12. Output pad slew rates
Pad type1
Slew rate select
field value
Drive load
(pF)
Rise/fall time
(ns)
ssr
11
50
2.2
200
6
10
50
22
200
28
01
50
42
200
50
00
50
210
200
220
Table 11. I/O electrical specifications (continued)
Characteristic
Symbol
Min
Max
Units
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