3/5

SRIX4K

MEMORY MAPPING

The SRIX4K is organised as 128 blocks of 32 bits

as shown in Figure 3. All blocks are accessible by

the READ_BLOCK command. Depending on the

write access, they can be updated by the

WRITE_BLOCK command. A WRITE_BLOCK up-

dates all the 32 bits of the block.

Figure 3. SRIX4K Memory Mapping

Block

Addr

Msb

32 bits Block

Lsb

Description

0

32 bits Boolean Area

Resettable OTP bits

1

32 bits Boolean Area

2

32 bits Boolean Area

3

32 bits Boolean Area

4

32 bits Boolean Area

5

32 bits binary counter

Count down

Counter

6

32 bits binary counter

7

User Area

Lockable EEPROM

8

User Area

9

User Area

10

User Area

11

User Area

12

User Area

13

User Area

14

User Area

15

User Area

16

User Area

EEPROM

...

User Area

127

User Area

255

OTP_Lock_Reg

ST Reserved

Fixed Chip_ID

(Option)

System OTP bits

UID0

64 bits UID Area

ROM

UID1