ST6246 STMICROELECTRONICS [STMicroelectronics], ST6246 Datasheet - Page 70

• Manufacturer Part Number: ST6246
• Description: 8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST6246B
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST6246B is mask programmed ROM version
of ST62T46B OTP devices.
It offers 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
70/72
406
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