tmp19a43fd TOSHIBA Semiconductor CORPORATION, tmp19a43fd Datasheet - Page 19

• Manufacturer Part Number: tmp19a43fd
• Description: 32-bit Risc Microprocessor
• Manufacturer: TOSHIBA Semiconductor CORPORATION

(Note)
SEQMOD
(0xFFFF_E510)
(note)This register is initialized only by power-on reset. It is not initialized in reset usually. ÔFLASHÕ
3.2.2
This register must be 32-bit accessed.
2) DSU probe enable/disable function
3) DSU enable (Enables use of DSU probes for debugging)
This interface is used when the DSU probe is used in debugging. This is the dedicated interface for
connection to the DSU probe. Please refer to the operation manual for the DSU probe you are going to
use for details of debugging procedures to use the DSU probe. Here, the function to enable/disable the
DSU probe in the DSU (EJTAG) mode is described.
1)
Bit Symbol
Read/Write
After reset
Function
Bit Symbol
Read/Write
After reset
Function
Bit Symbol
Read/Write
After reset
Function
Bit Symbol
Read/Write
After reset
Function
Protect function
This device allows use of on-board DSU probes for debugging. To facilitate this, the device is
implemented with a protection function to prevent easy reading of the internal flash memory by a
third party other than the authorized user. By enabling the protection function, it becomes
impossible to read the internal flash memory from a DSU probe. Use this function together with
the protection function of the internal flash memory itself as described later.
This device allows use of on-board DSU probes for debugging operations. To facilitate this, the
device is implemented with the "DSU probe inhibit" function (hereafter referred to as the "DSU
inhibit" function ) to prevent easy reading of the internal flash memory by a third party other than
the authorized user. By enabling the DSU inhibit function, use of any DSU probe becomes
impossible.
In order to prevent the DSU inhibit function from being accidentally removed by system runaway,
etc., the method to cancel the DSU inhibit function is in double protection structure so it is
necessary to set SEQMOD <DSUOFF> to "0" and also write the protect code "0x0000_00C5" to
the DSU protect control register SEQCNT to cancel the function. Then, debugging to use a DSU
probe can be allowed. While power to the device is still applied, setting SEQMOD <SEQON> to
"1" and writing "0x0000_00C5" to the SEQCNT register will enable the protection function again.
DSU (EJTAG) - PROBE Interface
15
23
31
7
Table 3-3 DSU Protect Mode Register
14
22
30
6
TMP19A43 (rev2.0)3-5
13
21
29
5
Always reads "0."
12
20
28
R
4
0
Always reads "0."
Always reads "0."
R
R
R
0
0
0
11
19
27
3
10
18
26
2
Flash Memory Operation
TMP19A43
17
25
1
9
1: DSU disable
0: DSU available
DSUOFF
R/W
16
24
0
1
8