SMS46
Preliminary Information
DEVICE OPERATION AND CONFIGURATION REGISTERS (CONTINUED)
Action
Writing a 0 enables
undervoltage detection for
the selected V input
Writing a 1 enables
overvoltage detection for
the selected V input
D3
MSB
V
3
0
D2
V
2
0
D1
V
1
0
D0
LSB
V
0
0
Action
OFF
400ms
800ms
1600ms
3200ms
6400ms
D2
WD2
0
0
1
1
1
1
D1
WD1
0
1
0
0
1
1
D0
LSB
WD0
0
1
0
1
0
1
1
1
1
1
Table 3. Configuration Register 5 (D0 through D3)
If WLDI is held low the timer will free-run generating a series
of resets. When RESET# returns high (after t
PRTO
) the
timer is reset to time zero. Register 6 is also used to set
the programmable reset time-out period (t
PRTO
).
D7
MSB
V
3
0
1
D6
V
2
0
1
D5
V
1
0
1
D4
LSB
V
0
0
1
Table 6. Configuration Register 6 (D0, D1, D2)
Action
Reading a 1 indicates the
source of out of limit fault
D7
MSB
D6
Address
Select
Lock
x
AS0
0
1
x
x
Action
DTI = 1010, responds only when
address bits = A2 & A1 logic states
DTI = 1011, responds only when
address bits = A2 & A1 logic states
Config. Reg. Read/Write enabled
Config. Reg. Read/Write locked out
1
Table 4. Status Register 5 (D4 through D7)
D7
MSB
Read
1
Only
1
1
1
1
D6
RTO1
0
0
1
1
D5
RTO0
0
1
0
1
D4
Read
Only
x
x
x
x
D3
Read
Only
x
x
x
x
Action
t
PRTO
= 25ms
t
PRTO
= 50ms
t
PRTO
= 100ms
t
PRTO
= 200ms
x
0
1
Note 1 - Setting this bit will cause a permanent Read/Write Lock out.
Table 7. Configuration Register 7 (D7, D6) Bits D5
through D0 are not used.
Table 5. Configuration Register 6 (D3 through D7)
Note 1 - Read Only bit D7 is set to a 1. Read only bits
D4 and D3 are revision control and the value indi-
cates the status code of the device (ie. 01 is status
code 1).
SUMMIT MICROELECTRONICS, Inc.
2083 1.1 06/04/04
9
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
