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| 型號(hào)： | EM78P5842 |
| 廠商： | ELAN Microelctronics Corp . |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁(yè)數(shù)： | 32/48頁(yè) |
| 文件大?。?/td> | 469K |
| 代理商： | EM78P5842 |
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EM78P5840/5841/5842
8-bit Micro-controller
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to change without notice.
2004/11/10 V2.6
VII.9_1 Code Option
EM78P5840 CODE Option Register
12 11 10
9
IR3 IR2 IR1 IR0 P71S P70S OSCM1 OSCM0
Bit 0 (/POT0):
program ROM protect option.
If set 1 to the bit, program memory can be access; else if clear this bit , program memory can not be
access.
Bit 3(MER) :
Memory error recover function
0
disable memory error recover function
1
enable memory error recovery function
If user enable memory error recovery function, MCU will improve effect from environment noise
.
Bit 4 (IRC2S): Internal RC oscillating frequency (for system CLK) select.
0
2M Hz
1
4M Hz
Bit5~Bit6 (OSCM0~OSCM1): EM78P5840 oscillating mode select.
OSCM1
OSCM0
0
0
0
1
1
X
Bit 7 (P70S): PORT70 function select bit:
OSCM1
OSCM0
P70S
0
0
X
0
1
X
1
X
1
1
X
0
Bit 8 (P71S): PORT71 function select bit:
0
/RESET pin selected..
1
General purpose INPUT port “PORT71” selected
Bit 9~ Bit12 (IR0~IR3): By setting IR0~IR3, IRC mode’s oscillating frequency can be adjust. Next table
show the trimming code table of IRC frequency.
IR3~IR0
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
* ”F” means the frequency of IRC output.
8
7
6
5
4
3
2
1
1
1
0
IRC2S
MER
/POT0
Oscillating mode
IRC mode
ERIC mode
Crystal mode
PORT70 status
General Purpose IO
OSC input, please cascade resister to AVDD
PLLC output, please cascade capacitor to AVSS
General Purpose IO, PLL function will disable
Frequency
1.05*F
1.10*F
1.15*F
1.20*F
1.25*F
1.30*F
1.35*F
1.40*F
0.65*F
0.70*F
0.75*F
0.80*F
0.85*F
0.90*F
0.95*F
1.0*F
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