DS87C520-WCL+ Maxim Integrated, DS87C520-WCL+ Datasheet - Page 28
![no-image](/images/no-image-200.jpg)
DS87C520-WCL+
Manufacturer Part Number
DS87C520-WCL+
Description
Manufacturer
Maxim Integrated
Datasheet
1.DS87C520QNL.pdf
(45 pages)
- Current page: 28 of 45
- Download datasheet (2Mb)
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
Figure 5. EPROM Programming Configuration
ROM-SPECIFIC FEATURES
The DS83C520 supports a subset of the EPROM features found on the DS87C520.
SECURITY OPTIONS
Lock Bits
The DS83C520 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
pin is sampled and latched on reset. The lock setting is enabled or disabled when the
EA
devices are manufactured 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 DS83C520 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.
28 of 45
Related parts for DS87C520-WCL+
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![DS87C520-MNL+](/photos/6/62/66288/175-40-dip_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MH IND 40-DIP
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-ENL+](/photos/6/86/68678/406-44-tqfp_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MH IND 44TQFP
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-MCL](/photos/6/62/66288/175-40-dip_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MHZ HS 40-DIP
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-QCL](/photos/6/62/66291/175-44-plcc_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MHZ HS 44PLCC
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-QCL/T&R](/photos/6/62/66291/175-44-plcc_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MHZ HS 44PLCC
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-QCL+T&R](/photos/6/62/66291/175-44-plcc_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MHZ HS 44PLCC
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-MNL](/photos/6/62/66288/175-40-dip_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MH IND 40-DIP
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-QNL](/photos/6/62/66291/175-44-plcc_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MH IND 44PLCC
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-WCL](/photos/12/43/124383/406-40-cdip_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MHZ HS 40CDIP
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-QCL+](/photos/6/62/66291/175-44-plcc_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MHZ HS 44PLCC
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-ECL+](/photos/6/86/68678/406-44-tqfp_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MHZ HS 44TQFP
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-MCL+](/photos/6/62/66288/175-40-dip_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MHZ HS 40-DIP
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-QNL+](/photos/6/62/66291/175-44-plcc_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MH IND 44PLCC
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-ECL](/photos/6/86/68678/406-44-tqfp_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MHZ HS 44TQFP
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS87C520-QNL/T&R](/photos/6/62/66291/175-44-plcc_tmb.jpg)
Part Number:
Description:
IC MCU EPROM/ROM 33MH IND 44PLCC
Manufacturer:
Maxim Integrated Products
Datasheet: