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參數(shù)資料
| 型號(hào)： | SM2964C40 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8-Bit Micro-controller |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 15/15頁 |
| 文件大?。?/td> | 381K |
| 代理商： | SM2964C40 |
December 1998
Specifications subject to change without notice,contact your sales representatives for the most recent information.
15/15
Ver1.0 PID 2964 08/00
SyncMOS Technologies Inc. SM2964
SM2964 Application Note
SM2964 may need pull-up resistor when
driving multiple device with its I/O pins.The
pull-up resistor value 10Kohm to 47Kohm
When using port 0 as input pin, user
need to set corresponding SFR
(special function register) to 1 before
read in data through port 0. Otherwise
data read may be incorrect.
SM2964 has 64KB internal ROM addressing space which fully
occupies 16-bit address line.
/EA pin of SM2964 will be disabled after internal ROM been
protected. This feature will prevent internal ROM content been dump
externally.
If the internal ROM not been protected, /EA pin function of SM2964 will be the
same as /EA pin function of intel 80C52.
I/O pin
SM2964
pull-up resister
10Kohm to
47Kohm
DEVICE 1
DEVICE N
N> 1
e.g. Original program Modified program
mov b,#0dh mov b,#0dh
djnz b,$ djnz b,$
mov c,p0.2 setb p0.2
mov acc.7, c mov c,p0.2
mov.7, c
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