ST6208C/09C ST6210C/20C
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST6210C/20C are mask programmed ROM
version of ST62T08C,T09C,T10C,T20C OTP de-
vices.
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
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
TEST
15
14V typ
10
5
TEST
100mA
max
4mA typ
0.5s min
150 µs typ
t
VR02001
5V 47mF
100nF
VSS
VDD
TEST
PROTECT
14V
100nF
ZPD15
15V
VR02003
Note: ZPD15 is used for overvoltage protection
66/70
154