ST6253C View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
ST6253C
STMicroelectronics
'ST6253C' PDF : 83 Pages View PDF
ST6253C ST6263C ST6263B ST6260C ST6260B
Figure 54. Programming wave form
TEST
0.5s min
In case the user wants to blow this fuse, high volt-
age must be applied on the TEST pin.
Figure 55. Programming Circuit
5V 47mF
15
14V typ
10
5
TEST
100mA
max
150 µs typ
4mA typ
t
VR02001
8.3.1 ROM READOUT PROTECTION
If the ROM READOUT PROTECTION option is
selected, a protection fuse can be blown to pre-
vent any access to the program memory content.
100nF
VSS
VDD
TEST
PROTECT
14V
100nF
ZPD15
15V
VR02003
Note: ZPD15 is used for overvoltage protection
The following section deals with the procedure for
transfer of customer codes to STMicroelectronics.
8.3.2 Transfer of Customer Code
Customer code is made up of the ROM contents
and the list of the selected mask options. The ROM
contents are to be sent on diskette, or by electronic
means, with the hexadecimal file generated by the
development tool. All unused bytes must be set to
FFh.
The selected mask options are communicated to
STMicroelectronics using the correctly filled OP-
TION LIST appended. See page 81.
8.3.3 Listing Generation and Verification
When STMicroelectronics receives the user’s ROM
contents, a computer listing is generated from it.
This listing refers exactly to the mask which will be
used to produce the specified MCU. The listing is
then returned to the customer who must thoroughly
check, complete, sign and return it to STMicroelec-
tronics. The signed listing forms a part of the con-
tractual agreement for the creation of the specific
customer mask.
The STMicroelectronics Sales Organization will be
pleased to provide detailed information on con-
tractual points.
79/83
Share Link: 