参数资料
型号: SAF-XE167HM-48FXXL
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: RISC MICROCONTROLLER, PQFP144
封装: 0.50 MM PITCH, GREEN, PLASTIC, LQFP-144
文件页数: 28/140页
文件大小: 1096K
代理商: SAF-XE167HM-48FXXL
XE167FM, XE167GM, XE167HM, XE167KM
XE166 Family Derivatives / Base Line
Electrical Parameters
Data Sheet
123
V2.0, 2009-03
Bus Cycle Control with the READY Input
The duration of an external bus cycle can be controlled by the external circuit using the
READY input signal. The polarity of this input signal can be selected.
Synchronous READY permits the shortest possible bus cycle but requires the input
signal to be synchronous to the reference signal CLKOUT.
An asynchronous READY signal puts no timing constraints on the input signal but incurs
a minimum of one waitstate due to the additional synchronization stage. The minimum
duration of an asynchronous READY signal for safe synchronization is one CLKOUT
period plus the input setup time.
An active READY signal can be deactivated in response to the trailing (rising) edge of
the corresponding command (RD or WR).
If the next bus cycle is controlled by READY, an active READY signal must be disabled
before the first valid sample point in the next bus cycle. This sample point depends on
the programmed phases of the next cycle.
相关PDF资料
PDF描述
SAF-XE167HM-72FXXL RISC MICROCONTROLLER, PQFP144
SAF-XE167KM-48FXXL RISC MICROCONTROLLER, PQFP144
SAF-XE167KM-72FXXL RISC MICROCONTROLLER, PQFP144
SAK-XE167FM-48FXXL RISC MICROCONTROLLER, PQFP144
SAK-XE167FM-72FXXL 32-BIT, FLASH, RISC MICROCONTROLLER, PQFP144
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