tmp1940cyaf TOSHIBA Semiconductor CORPORATION, tmp1940cyaf Datasheet - Page 376
tmp1940cyaf
Manufacturer Part Number
tmp1940cyaf
Description
32-bit Tx System Risc Tx19 Family
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP1940CYAF.pdf
(464 pages)
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(0xFFFF_E514)
SEQCNT
(4) Application example
External port
data, etc.
Note: The security feature of the TMP1940FDBF flash memory is not intended to guarantee rigid security
Name
Read/Write
Reset Value
Function
Name
Read/Write
Reset Value
Function
Name
Read/Write
Reset Value
Function
Name
Read/Write
Reset Value
Function
DSU-ICE can not be used.
The following flowchart exemplifies how to use the security feature with a DSU-ICE.
protection. In cases where security protection is of utmost importance, use the TMP1940CYAF
that contains mask ROM.
15
23
31
7
Figure 3.6 Using the Security Feature
No
Protect/unprotect judgment routine
Program SEQMOD and SEQCNT
Security remains on.
DSU-ICE can be used until the chip
is powered off.
14
22
30
6
to turn off security feature.
Security on at power-up
TMP1940FDBF-18
TMP1940FDBF
Turn off security
(user-created)
feature?
13
21
29
5
Must be written as 0x0000_00C5.
Must be written as 0x0000_00C5.
Must be written as 0x0000_00C5.
Must be written as 0x0000_00C5.
Yes
12
20
28
4
W
W
W
W
11
19
27
3
TMP1940FDBF
10
18
26
2
17
25
1
9
16
24
0
8
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