Programming the M8 USB Microcontrollers with a Hi-Lo Programmer
2
5. Place a chip to be programmed into the Adapter Base’s
ZIP socket and push the Adapter Base’s lever forward to
secure the chip in its position. Note that the chip should be
top justified, i.e., pin 1 of the chip should be placed at the
top left position on the Adapter Base’s socket.
6. Open the Cystart.exe software on the PC. See Figure 2.
7. From Cystart, click on the Setup menu. The I/O Base
Address window will pop up allowing the user to select the
COM Port and the desired baud rate. The “Programmer
Status” message at the end of this window shows status
of the serial communication between the Cystart and the
programmer hardware. When the “Programmer Status”
message changes to “EXIST,” click the “Cancel” button to
close this window.
At this point, communication between the programmer and
the Cystart GUI has been established. From the Cystart GUI,
the continuing steps allow the user to select the part and the
.hex file to be programmed on the part. The .hex file is
generated by the Cyasm assembler. To learn how to create
the .hex file, refer to the Cyasm User’s Guide, which can be
downloaded from the Cypress web site at:
http://www.cypress.com/.
8. Click on the Device menu and select the device to be
programmed.
9. From the File menu, select Load File to Buffer. The Load
File menu will open to allow the user to browse to the .hex
file that need to be programmed on the chip. Click on the
.hex file and then OK. Note that the Cystart software is
16-bit, so files and folders with long names will be
truncated.
10.A File Format window will open. Select the File Format =
“Intel HEX,” Unused Bytes = “Don’t Care” or “FF,” then click
OK. The File Format window will automatically close.
11.Click the Program button to start programming.
Note that after the programming is done, the user needs to
click on the “Cancel” button to close the Program window.
Other features of the programmer are:
The Blank Check enables the user to verify that the chip
PROM cells contain all 1s.
With the chip inserted in the Adapter Base’s socket, clicking
the Read button and then the Edit menu allows the user to
read the contents of the PROM in the chip. The Edit menu
also enables the user to search or move bytes in the buffer,
fill the buffer with certain values, or edit the buffer. Note that
the PROM cells are defaulted to all 1s. Even though the M8
chips are One Time Programmable (OTP), reprogramming
the chips with the cells being changed from “1” to “0” is
permissible (assuming the security fuse has not been blown),
but the reverse is not possible.
The Verify button ensures that the chip's PROM matches the
contents of the buffer.
After the chip has been programmed, clicking the
Security/Run buttons blows the chip’s security fuse to prevent
the program on the chip to be read. Reading the chip after the
security fuse has been blown returns 0xFFs.
Figure 2 Hi-Lo Programmer CYSTART Software (GUI)
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