參數(shù)資料
型號(hào): HMS81C20XXA
廠商: Electronic Theatre Controls, Inc.
英文描述: CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver
中文描述: CMOS單芯片8位微控制器與A / D轉(zhuǎn)換器
文件頁數(shù): 90/107頁
文件大?。?/td> 1482K
代理商: HMS81C20XXA
HMS81C2012A/2020A
86
SEP. 2004 Ver 2.00
21. OTP PROGRAMMING
21.1 DEVICE CONFIGURATION AREA
The Device Configuration Area can be programmed or left
unprogrammed to select device configuration such as secu-
rity bit.
Sixteen memory locations (7030
H
~ 703F
H
) are designated
as Customer ID recording locations where the user can
store check-sum or other customer identification numbers.
This area is not accessible during normal execution but is
readable and writable during program / verify.
Figure 21-1 Device Configuration Area
DEVICE
7030
H
7030
H
703F
H
703F
H
ID
CONFIG
CONFIGURATION
AREA
7031
H
ID
7032
H
ID
7033
H
ID
7034
H
ID
7035
H
ID
7036
H
ID
7037
H
ID
7038
H
ID
7039
H
ID
703A
H
ID
703B
H
ID
703C
H
ID
703D
H
ID
703E
H
ID
7
6
5
4
3
2
1
0
RCO
INITIAL VALUE: -000 -0-0
B
ADDRESS: 703F
H
CONFIG
LOCK
Code Protect
0 : Allow Code Read Out
1 : Lock Code Read Out
PFD Level Selection
00: PFD = 2.7V
01: PFD = 2.7V
10: PFD = 3.0V
11: PFD = 2.4V
External RC OSC Selection
0: Crystal or Resonator Oscillator
1: External RC Oscillator
PFS0
PFS1
R7X
R74, R75 Port Selection
0 : Sub Clock
1 : R74, R75
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