
MB91460D Series
38
5.
Poweron Sequence in parallel programming mode
The ash memory can be accessed in programming mode after a certain wait time, which is needed for Security
Vector fetch:
Minimum wait time after VDD5/VDD5R power on:
2.76 ms
Minimum wait time after INITX rising:
1.0 ms
6.
Flash Security
6.1.
Vector addresses
Two Flash Security Vectors (FSV1, FSV2) are located parallel to the Boot Security Vectors (BSV1, BSV2)
controlling the protection functions of the Flash Security Module:
FSV1: 0x14:8000
BSV1: 0x14:8004
FSV2: 0x14:8008
BSV2: 0x14:800C
6.2.
Security Vector FSV1
The setting of the Flash Security Vector FSV1 is responsible for the read and write protection modes and the
individual write protection of the 8 Kbytes sectors.
6.2.1.
FSV1 (bit31 to bit16)
The setting of the Flash Security Vector FSV1 bits [31:16] is responsible for the read and write protection modes.
Explanation of the bits in the Flash Security Vector FSV1 [31:16]
DQ0 to DQ7
Internal data bus
DQ0 to DQ7
P03_0 to P03_7
192 to 199
DQ8 to DQ15
P02_0 to P02_7
200 to 207
FSV1[31:19]
FSV1[18]
WriteProtection
Level
FSV1[17]
Write Protection
FSV1[16]
Read Protection
Flash Security Mode
set all to “0”
set to “0”
set to “1”
Read Protection (all device modes,
except INTVEC mode MD[2:0]
= “000”)
set all to “0”
set to “0”
set to “1”
set to “0”
Write Protection (all device modes,
without exception)
set all to “0”
set to “0”
set to “1”
Read Protection (all device modes,
except INTVEC mode MD[2:0]
= “000”)
and Write Protection (all device modes)
set all to “0”
set to “1”
set to “0”
set to “1”
Read Protection (all device modes,
except INTVEC mode MD[2:0]
= “000”)
set all to “0”
set to “1”
set to “0”
Write Protection (all device modes,
except INTVEC mode MD[2:0]
= “000”)
set all to “0”
set to “1”
Read Protection (all device modes,
except INTVEC mode MD[2:0]
= “000”)
and Write Protection (all device modes
except INTVEC mode MD[2:0]
= “000”)