SAF-C164SM Infineon Technologies, SAF-C164SM Datasheet - Page 50

• Manufacturer Part Number: SAF-C164SM
• Description: 16-Bit CMOS Microcontroller
• Manufacturer: Infineon Technologies

3.6
During normal operation the One-Time-Programmable (OTP) memory appears like a
standard ROM. In the special OTP programming modes, however, the OTP memory can
be programmed by writing to its special programming interface. Programming is
executed in units of 16-bit words and each programming cycle takes about 100 s. OTP
programming requires an external programming voltage of
applied to pin EA/
The OTP memory can be programmed in CPU Host Mode (CHM) via software or in
External Host Mode (EHM) via external hardware.
Figure 3-5
User’s Manual
1)
2)
The special signal RSEL must fulfill the same timing requirements as the address lines.
Note: All timings represent minimum values.
ADDR
DATA
WR
EA/Vpp
CE
Earliest possible begin of next programming cycle.
V
PP
must be switched off for verify accesses, it may remain on for subsequent programming cycles.
OTP Memory Programming
OTP Programming Cycle
Vpp
<
V
DD
V
PP
.
50 ns
10 µs
10 ns
Programming Data
3-12
OTP Word Address
100 µs
V
PP
100 ns
100 ns
Memory Organization
= 11.5 V
120 ns
50 ns
C164CM/C164SM
2)
Derivatives
MCT05093
1)
V1.0, 2002-02
5% which is