参数资料
型号: MK20X256VLQ100
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 100 MHz, RISC MICROCONTROLLER, PQFP144
封装: 20 X 20 MM, LQFP-144
文件页数: 13/74页
文件大小: 1849K
代理商: MK20X256VLQ100
5.2.1 Device clock specifications
Symbol
Description
Min.
Max.
Unit
Notes
Normal run mode
fSYS
System and core clock
100
MHz
fSYS_USB
System and core clock when USB in operation
20
MHz
fBUS
Bus clock
50
MHz
FB_CLK
FlexBus clock
50
MHz
fFLASH
Flash clock
25
MHz
VLPR mode
fSYS
System and core clock
2
MHz
fBUS
Bus clock
2
MHz
FB_CLK
FlexBus clock
2
MHz
fFLASH
Flash clock
1
MHz
5.2.2 General switching specifications
These general purpose specifications apply to all signals configured for GPIO, UART,
CAN, CMT, and I2C signals.
Symbol
Description
Min.
Max.
Unit
Notes
GPIO pin interrupt pulse width (digital glitch filter
disabled) — Synchronous path
1.5
Bus clock
cycles
GPIO pin interrupt pulse width (digital glitch filter
disabled, analog filter enabled) — Asynchronous path
100
ns
GPIO pin interrupt pulse width (digital glitch filter
disabled, analog filter disabled) — Asynchronous path
16
ns
External reset pulse width (digital glitch filter disabled)
TBD
Mode select (EZP_CS) hold time after reset
deassertion
2
Bus clock
cycles
Port rise and fall time (high drive strength)
Slew disabled
Slew enabled
12
36
ns
Port rise and fall time (low drive strength)
Slew disabled
Slew enabled
32
36
ns
1. The greater synchronous and asynchronous timing must be met.
2. This is the shortest pulse that is guaranteed to be recognized.
3. 75pF load
General
K20 Sub-Family Data Sheet Data Sheet, Rev. 4, 3/2011.
20
Preliminary
Freescale Semiconductor, Inc.
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