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Note: Some of timing charts in this document may be omitted or simplified for explanatory purposes.
Start-after POR
Condition
Each detector
formation conditions
VBAT Low voltage
1
VCC Low voltage
VCC High voltage
VBAT Low voltage
2
VCC Low voltage
VCC High voltage
VBAT Low voltage
3
VCC Low voltage
VCC High voltage
VBAT Low voltage
4
VCC Low voltage
VCC High voltage
VBAT Low voltage
When at least one
condition continues the
5
VCC Low voltage
state where it does not
detect
VCC High voltage
Notes of Table 7.10-5
* "○" means normal value (undetected state), and "-" means that a test is not performed.
* In the case of 5, three detection circuits continue waiting until being normal value (undetected state).
When it becomes normal value, diagnosis operation starts at that timing, and end the initial diagnosis
for about 48 μs.
* It does not operate with voltage less than the VCC undervoltage POR detection voltage.
Figure 7.10-4 Description of diagnositic operation
The state where it does
The state where it does
not detect Test 1
not detect Test 2
(Normal threshold)
(A threshold is changed)
○
○
○
○
○
○
○
In the case of NG,
○
it is also at any 1
conditions.
○
○
○
In the case of NG,
○
○
it is also at any 1
conditions.
○
○
○
○
○
○
○
○
－
－
－
Table 7.10-5 Summary of initial diagnostic operation
The state where it does
Diagnostic
not detect Test 3
result
(Normal threshold)
○
○
○
○
Normal
○
○
○
○
○
○
Abnormal
○
○
○
○
Abnormal
○
○
In the case of NG,
○
it is also at any 1
Abnormal
conditions.
○
－
－
－
－
Abnormal
－
－
31 / 49
TB9051FTG
Under diagnostic
After termination
operation
of initial diagnostic
DIAG
OUT1/2
DIAG
OUT1/2
PIN
PIN
PIN
PIN
Output
L
High-z
H
Function
Output
L
High-z
L
Function
Output
L
High-z
L
Function
Output
L
High-z
L
Function
Initial diagnosis does not
start.
L
High-z
L
High-z
It becomes an unusual
function of Table 7.1-2.
Ver.1.1 2019-03-14
Memo
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