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參數(shù)資料
| 型號： | DS83C530 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | EPROM/ROM Micro with Real Time Clock(帶實時時鐘的EPROM/ROM高速微控制器) |
| 中文描述： | EPROM微控制器，帶有實時時鐘 |
| 文件頁數(shù)： | 26/41頁 |
| 文件大小： | 437K |
| 代理商： | DS83C530 |
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DS87C530/DS83C530
070898 26/41
EPROM PROGRAMMING CONFIGURATION
Figure 5
P3.3
P3.4
P3.5
CONTROL SIGNALS
A14
A15
RST
CONTROL SIGNALS
PORT 1
PORT 0
46
45
44
43
PORT 2
EA/V
PP
ALE/PROG
PSEN
P2.7
P2.6
50 49 48 47
+5V
PROGRAM SIGNALS
PROGRAM SIGNALS
CONTROL SIGNALS
CONTROL SIGNALS
CONTROL SIGNALS
C
C
PROG/VERIFY DATA
A8 – A13
A0 – A7
2
3
4
5
6
7
8
9
10
11
13
14
15
16
17
27 28 29 30 31 32 33
41
40
35
34
ROM–SPECIFIC FEATURES
The DS83C530 supports a subset of the EPROM fea-
tures found on the DS87C530.
SECURITY OPTIONS
Lock Bits
The DS83C530 employs a lock that restricts viewing of
the ROM contents. When set, the lock will prevent
MOVC instructions in external memory from reading
program bytes in internal memory. When locked, the EA
pin is sampled and latched on reset. The lock setting is
enabled or disabled when the devices are manufac-
tured according to customer specifications. The lock bit
cannot be read in software, and its status can only be
determined by observing the operation of the device.
Encryption Array
The DS83C530 Encryption Array allows an authorized
user to verify ROM without allowing the true memory
contents to be dumped. During a verify, each byte is
Exclusive NORed (XNOR) with a byte in the Encryption
Array. This results in a true representation of the ROM
while the Encryption is unprogrammed (FFh)
.
Once the
Encryption Array is programmed in a non–FFh state, the
Encryption Array is programmed (or optionally left
unprogrammed) when the devices are manufactured
according to customer specifications.
DS83C530 ROM VERIFICATION
The DS83C530 memory contents can be verified using
a standard EPROM programmer. The memory address
to be verified is placed on the pins shown in Figure 5,
and the programming control pins are set to the levels
shown in Table 10. The data at that location is then
asserted on port 0.
DS83C530 SIGNATURE
The Signature bytes identify the DS83C530 to EPROM
programmers. This information is at programming
addresses 30h, 31h, and 60h. Because mask ROM de-
vices are not programmed in device programmers,
most designers will find little use for the feature, and it is
included only for compatibility.
Address
30h
31h
60h
Value
DAh
31h
01h
Meaning
Manufacturer
Model
Extension
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| DS87C530 | EPROM/ROM Micro with Real Time Clock(帶實時時鐘的EPROM/ROM高速微控制器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS83C530-DS87C530 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock |
| DS83C530-ECL | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock |
| DS83C530-ECL+ | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock |
| DS83C530-ENL | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock |
| DS83C530-ENL+ | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock |
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