m41st87w STMicroelectronics, m41st87w Datasheet - Page 34

• Manufacturer Part Number: m41st87w
• Description: 5.0, 3.3, Or 3.0v, 1280 Bit 160 X8 Secure Serial Rtc And Nvram Supervisor With Tamper Detection
• Manufacturer: STMicroelectronics

M41ST87Y, M41ST87W
Table 13. Default Values
Note: All other control bits are undetermined.
Note: 1. UC = Unchanged.
34/42
Initial Power-up
Subsequent Power-up (with
battery back-up)
Initial Power-up
Subsequent Power-up (with
battery back-up)
Initial Power-up
Subsequent Power-up (with
battery back-up)
Initial Power-up
Subsequent Power-up (with
battery back-up)
2.
3. When TEB
4. WDS, BMB0-BMB4, RB0, RB1.
5. 32kHz output valid only on V
⇑
Condition
Condition
Condition
Condition
= V
CC
rising;
(1,2)
(1,2)
(1)
(1)
X
is set to '1,' the HT Bit will not be set on power-down (Tamper Time-Stamp will have precedence).
⇓
= V
CC
falling.
TCHI/TCLO1
CC
UC
TR
and 2
32kE
0
ABE
.
1
UC
UC
0 ⇑
0
0
(5)
UC
ST
0
CLR1 and 2
SQWE
THS
0 ⇑
UC
UC
0
0
0
UC
OF
1
TEB1 and 2
TIE1 and 2
SQWOD
UC
UC
0 ⇑
OFIE
1
0
0
0 ⇑
0
TCM1 and 2 TPM1 and 2
CLRPW0
HT
1 ⇓
PFOD
1
UC
UC
UC
(3)
1
0
0
Out
UC
1
WATCHDOG Register
CLRPW1
UC
UC
0
0
0 ⇓
FT
0
0 ⇓
0
TDS1 and 2
CLR1
CLR2
and
UC
UC
0
0
AFE
0 ⇑
0
EXT
EXT
(4)