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| CD00001237 Datasheet, PDF (98/105 Pages) STMicroelectronics – 8-bit MCUs with A/D converter | |||
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ST6215C ST6225C
TRANSFER OF CUSTOMER CODE (Contâd)
12.6.2 ROM Version
The ST6215C/25C are mask programmed ROM
version of ST62T15C,T25C OTP devices.
They offer the same functionality as OTP devices,
selecting as ROM options the options defined in
the programmable option byte of the OTP version.
Figure 79. Programming Circuit
5V 4.7µF
100nF
VDD
VSS
ROM Readout Protection. If the ROM READOUT
PROTECTION option is selected, a protection
fuse can be blown to prevent any access to the
program memory content.
In case the user wants to blow this fuse, high volt-
age must be applied on the VPP pin.
Figure 80. Programming wave form
VPP
15
14V typ
10
5
0.5s min
100 µs max
PROTECT
VPP
14V
100nF
ZPD15
15V
VPP
400mA
max
150 µs typ
VR02003
Note: ZPD15 is used for overvoltage protection
4mA typ
t
VR02001
98/105
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