Справочник Пользователя для IBM EM78P447N
EM78P447N
8-Bit Microcontroller with OTP ROM
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Product Specification (V1.1) 03.30.2005
(This specification is subject to change without further notice)
Table 13 RC Oscillator Frequencies
Cext
Rext
Average Fosc 5V,25
°C
Average Fosc 3V,25
°C
3.3k
4.32 MHz
3.56 MHz
5.1k
2.83 MHz
2.8 MHz
10k 1.62MHz
1.57
MHz
20 pF
100k
184 KHz
187 KHz
3.3k
1.39 MHz
1.35 MHz
5.1k
950 KHz
930 KHz
10k
500 KHz
490 KHz
100 pF
100k 54KHz
55
KHz
3.3k
580 KHz
550 KHz
5.1k
390 KHz
380 KHz
10k
200 KHz
200 KHz
300 pF
100k
21 KHz
21 KHz
NOTE
1. Measured on DIP packages.
2. For design reference only.
4.8 CODE Option Register
The EM78P447N has one CODE option word that is not a part of the normal program
memory. The option bits cannot be accessed during normal program execution.
memory. The option bits cannot be accessed during normal program execution.
Code Option Register and Customer ID Register arrangement distribution:
Word 0
Word 1
Bit12~Bit0 Bit12~Bit0
4.8.1 Code Option Register (Word 0)
Word 0
Bit12
Bit11
Bit10
Bit9
Bit8
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
-
-
EC
-
CLKS ENWDTB
TYPE
HLF
OSC
HLP
PR2
PR1
PR0
Bit 12 、11 :
Not used.
Reserved.
The bit set to “1” all the time.
Bit 10 (EC):
Error recovery Bit.
0: Enable
1: Disable
Bit 9:
Not used.
Reserved.
The bit set to “0” all the time.