參數(shù)資料
型號: Q67120-C508
英文描述: IC-SM-8-BIT CPU 12-MHZ
中文描述: 集成電路釤8位CPU的12兆赫
文件頁數(shù): 93/121頁
文件大?。?/td> 1000K
代理商: Q67120-C508
Power Saving Modes
C501
Semiconductor Group
8-4
8.4
State of Pins in Software Initiated Power Saving Modes
In the idle mode and in the power down mode the port pins of the C501 have a well defined status
which is listed in the following
table 8-10
. This state of some pins also depends on the location of
the code memory (internal or external).
Table 8-10 :
Status of External Pins During Idle and Software Power Down Mode
Outputs
Last Instruction Executed from
Internal Code Memory
Last Instruction Executed from
External Code Memory
Idle
Power Down
Idle
Power Down
ALE
High
Low
High
Low
PSEN
High
Low
High
Low
PORT 0
Data
Data
Data
Float
PORT 1
Data
Data
Data
Data
PORT 2
Data
Data
Address
Data
PORT 3
Data/alternate
outputs
Data/last output
Data/alternate
outputs
Data/last output
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