COP8SAA720 DATAMAN-48
COP8SAA720 DATAMAN-48
If you like to make a COP8SAA720 useless then program it with DATAMAN-48! After "programming" the chip, you get the message "Device code unmatched". Maybe my firmware 1.90 or my software 4.30 (NT) is to old ?
Re: COP8SAA720 DATAMAN-48
The COP8SAA720 ist not a low voltage device.
It is working with regular 5 Volt VCC and programming voltage is about 11.9 Volt. Nevertheless i have installed the upgrade board and the new Firmware 2.20. Result: same problem as before. I spent now some chips for checking out the problem exactly and i found that the error depends of the programmed data. The COP8SAA has an EPROM size of 1KByte (COP8SAB=2K, COP8SAC=4K). There are 9 additional bytes on the chip which cannot be read from the microcontroller and cannot set to write protect. These are the ECON (chip configuration register) and the so called "user data field" of 8 byte. The error "device code unmatched" only occurs, when these additional bytes will be programmed with data different from hex 00. The user data field is normally used for storing the revision number and similar information. In my project in need to programm these bytes and so always i got this error. I think it must be an error in the dataman software(wrong programming or read algorithm for the COP8SA microcontrollers).
It is working with regular 5 Volt VCC and programming voltage is about 11.9 Volt. Nevertheless i have installed the upgrade board and the new Firmware 2.20. Result: same problem as before. I spent now some chips for checking out the problem exactly and i found that the error depends of the programmed data. The COP8SAA has an EPROM size of 1KByte (COP8SAB=2K, COP8SAC=4K). There are 9 additional bytes on the chip which cannot be read from the microcontroller and cannot set to write protect. These are the ECON (chip configuration register) and the so called "user data field" of 8 byte. The error "device code unmatched" only occurs, when these additional bytes will be programmed with data different from hex 00. The user data field is normally used for storing the revision number and similar information. In my project in need to programm these bytes and so always i got this error. I think it must be an error in the dataman software(wrong programming or read algorithm for the COP8SA microcontrollers).
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Dataman (Neil Parker)
- Posts: 933
- Joined: 10 Nov 2011 09:51
Re: COP8SAA720 DATAMAN-48
Hi,
Our engineers have checked this device, and filled the ECON register, it can be programmed correctly. Please ensure that you are not filling this register with corrupted data, 1 bit in ECON is a secure register please enable program configuration/ secure in the device options then program the chip. This will secure the chip, the software is not at fault here. If the chip is not secure, all of the main memory and register can be read back.
Neil
Our engineers have checked this device, and filled the ECON register, it can be programmed correctly. Please ensure that you are not filling this register with corrupted data, 1 bit in ECON is a secure register please enable program configuration/ secure in the device options then program the chip. This will secure the chip, the software is not at fault here. If the chip is not secure, all of the main memory and register can be read back.
Neil
Re: COP8SAA720 DATAMAN-48
Hallo
the ECON register for COP8SAA is described here: http://www.national.com/ds/CO/COP8SAA5.pdf
Bit 1 is reserved and Bit 7 must be always 0. All other combinations of bits are allowed. If i program my COP8SAA720 with ECON 55 (hex), i have no problem.
But in my application, i have to program the ECON with 4D or 4F, because i have a crystal oscillator
on my board an i want to disable HALT and WATCHDOG options and to enable POR (power on reset).
If i try to program my COP8SAA720 with this ECON data (4D or 4F), the chip will be damaged.
the ECON register for COP8SAA is described here: http://www.national.com/ds/CO/COP8SAA5.pdf
Bit 1 is reserved and Bit 7 must be always 0. All other combinations of bits are allowed. If i program my COP8SAA720 with ECON 55 (hex), i have no problem.
But in my application, i have to program the ECON with 4D or 4F, because i have a crystal oscillator
on my board an i want to disable HALT and WATCHDOG options and to enable POR (power on reset).
If i try to program my COP8SAA720 with this ECON data (4D or 4F), the chip will be damaged.
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