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EM78P468NBQS/NBQJ 数据表(PDF) 51 Page - ELAN Microelectronics Corp

部件名 EM78P468NBQS/NBQJ
功能描述  8-Bit Microcontroller
PDF  82 Pages
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制造商  EMC [ELAN Microelectronics Corp]
网页  http://www.emc.com.tw
标志 EMC - ELAN Microelectronics Corp

EM78P468NBQS/NBQJ 数据表(HTML) 51 Page - ELAN Microelectronics Corp

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EM78P468N/L
8-Bit Microcontroller
Product Specification (V1.6) 12.31.2007
• 45
(This specification is subject to change without further notice)
6.11 Code Options
The EM78P468N/L 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.
Code Option Register and Customer ID Register arrangement distribution:
Word 1 of code options is for customer ID code application.
Word 1
Bit 12~Bit 0
Word 0 of Code Options is for IC function setting. The following are the settings for
OTP IC programming:
Word 0
Bits12~10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
1
CYES HLFS ENWDTB
FSMD
FMMD1 FMMD0
HLP
PR2
PR1
PR0
Bits 12 ~ 10:
Not used.
These bits are set to “1” all the time.
Bit 9 (CYES):
Cycle select for JMP and CALL instructions
CYES = “0”:
only one instruction cycle (JMP or CALL) can be executed
CYES = “1”:
two instructions cycles (JMP and CALL) can be executed
Bit 8 (HLFS):
main or sub-oscillator select
HLFS = “0”:
CPU is set to select sub-oscillator when reset occurs.
HLFS = “1”:
CPU is set to select main-oscillator when reset occurs.
Bit 7 (ENWDTB):
Watchdog timer enable/disable bit.
ENWDTB = “0”:
Enable watchdog timer.
ENWDTB = “1”:
Disable watchdog timer.
Bit 6 (FSMD):
sub-oscillator type selection.
Bits 5, 4 (FMMD1, 0):
Main Oscillator Type Selection
FSMD
FMMD1
FMMD0
Main Oscillator Type
Sub Oscillator Type
0
0
0
RC type
RC type
0
0
1
Crystal type
RC type
0
1
×
PLL type
RC type
1
0
0
RC type
Crystal type
1
0
1
Crystal type
Crystal type
1
1
×
PLL type
Crystal type



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