st62t25cn6 STMicroelectronics, st62t25cn6 Datasheet - Page 98

• Manufacturer Part Number: st62t25cn6
• Description: 8-bit Mcus With A/d Converter, Two Timers, Oscillator Safeguard & Safe Reset
• Manufacturer: STMicroelectronics

ST6215C/ST6225C
TRANSFER OF CUSTOMER CODE (Cont’d)
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 81. Programming Circuit
Note: ZPD15 is used for overvoltage protection
98/105
1
V
V
V
PP
DD
SS
5V
100nF
100nF
4.7µF
PROTECT
ZPD15
15V
VR02003
14V
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 V
Figure 82. Programming wave form
4mA typ
14V typ
400mA
max
V
V
15
10
PP
PP
5
100 µs max
150 µs typ
0.5s min
PP
pin.
VR02001
t