参数资料
型号: MK20DX256ZVLQ10R
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: 31/74页
文件大小: 1023K
代理商: MK20DX256ZVLQ10R
6.4.3 Flexbus Switching Specifications
All processor bus timings are synchronous; input setup/hold and output delay are given in
respect to the rising edge of a reference clock, FB_CLK. The FB_CLK frequency may be
the same as the internal system bus frequency or an integer divider of that frequency.
The following timing numbers indicate when data is latched or driven onto the external
bus, relative to the Flexbus output clock (FB_CLK). All other timing relationships can be
derived from these values.
Table 25. Flexbus limited range switching specifications
Num
Description
Min.
Max.
Unit
Notes
Operating voltage
2.7
3.6
V
Frequency of operation
50
MHz
FB1
Clock period
20
ns
FB2
Address, data, and control output valid
11.5
ns
FB3
Address, data, and control output hold
0.5
ns
FB4
Data and FB_TA input setup
8.5
ns
FB5
Data and FB_TA input hold
0.5
ns
1. Specification is valid for all FB_AD[31:0], FB_BE/BWEn, FB_CSn, FB_OE, FB_R/W,FB_TBST, FB_TSIZ[1:0], FB_ALE,
and FB_TS.
2. Specification is valid for all FB_AD[31:0] and FB_TA.
Table 26. Flexbus full range switching specifications
Num
Description
Min.
Max.
Unit
Notes
Operating voltage
1.71
3.6
V
Frequency of operation
TBD
MHz
FB1
Clock period
TBD
ns
FB2
Address, data, and control output valid
13.5
ns
FB3
Address, data, and control output hold
0
ns
FB4
Data and FB_TA input setup
13.7
ns
FB5
Data and FB_TA input hold
0.5
ns
1. Specification is valid for all FB_AD[31:0], FB_BE/BWEn, FB_CSn, FB_OE, FB_R/W,FB_TBST, FB_TSIZ[1:0], FB_ALE,
and FB_TS.
2. Specification is valid for all FB_AD[31:0] and FB_TA.
Peripheral operating requirements and behaviors
K20 Sub-Family Data Sheet Data Sheet, Rev. 5, 5/2011.
Freescale Semiconductor, Inc.
Preliminary
37
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