st62t25c STMicroelectronics, st62t25c Datasheet - Page 66

• Manufacturer Part Number: st62t25c
• Description: 8-bit Otp/eprom Mcus With A/d Converter, Oscillator Safeguard, Safe Reset And 28 Pins
• Manufacturer: STMicroelectronics

ST6215C/25C
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
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 1. Programming wave form
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4mA typ
14V typ
100mA
TEST
TEST
max
15
10
5
150 s typ
0.5s min
VR02001
t
1.2 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.
In case the user wants to blow this fuse, high volt-
age must be applied on the TEST pin.
Figure 2. Programming Circuit
Note: ZPD15 is used for overvoltage protection
TEST
V
V
DD
SS
5V
100nF
100nF
47mF
PROTECT
ZPD15
15V
VR02003
14V