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| 型号： | FSLBOT |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 26/46页 |
| 文件大小： | 0K |
| 描述： | KIT TOWER MECH BOARD |
| 视频文件： | Freescale Tower Overview - Another Geek Moment Freescale Tower Labs 1 & 2 - Another Geek Moment |
| 特色产品： | Tower Mechatronics Board and Robot |
| 标准包装： | 1 |
| 系列： | ColdFire® |
| 主要目的： | 机器人 |
| 嵌入式： | 否 |
| 主要属性： | 步行机器人结构 |
| 已供物品： | 线路板，4 PWM 伺服系统，用户指南，汇编指令 |
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Electrical Characteristics
MCF52259 ColdFire Microcontroller, Rev. 5
Freescale
32
2.9
USB Operation
2.10
Mini-FlexBus External Interface 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 80 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 15. USB Operation Specifications
Characteristic
Symbol
Value
Unit
Minimum core speed for USB operation
fsys_USB_min
16
MHz
Table 16. Mini-FlexBus AC Timing Specifications
Num
Characteristic
Min
Max
Unit
Notes
Frequency of Operation
—
80
MHz
MB1
Clock Period
12.5
—
ns
MB2
Output Valid
—
8
ns
1
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.
MB3
Output Hold
2
—
ns
MB4
Input Setup
6
—
ns
2
2 Specification is valid for all MB_D[7:0].
MB5
Input Hold
0
—
ns
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