SMS46
PreliminaryInformation
DEVICE OPERATION AND CONFIGURATION REGISTERS (CONTINUED)
D3
MSB
D0
LSB
D0
LSB
D2
D1
D2
D1
Action
Action
OFF
WD2
WD1 WD0
V3
0
V2
V1
V0
0
0
0
1
1
1
1
0
1
0
0
1
1
0
1
0
1
0
1
Writing a 0 enables
undervoltage detection for
the selected V input
0
1
0
1
400ms
800ms
1600ms
3200ms
6400ms
Writing a 1 enables
overvoltage detection for
the selected V input
1
1
Table 3. Configuration Register 5 (D0 through D3)
Table 6. Configuration Register 6 (D0, D1, D2)
IfWLDIisheldlowthetimerwillfree-rungeneratingaseries
of resets. When RESET# returns high (after tPRTO) the
timer is reset to time zero. Register 6 is also used to set
the programmable reset time-out period (tPRTO).
D7
MSB
D4
LSB
D6
D5
Action
D7
D6
V3
0
V2
0
V1
0
V0
0
MSB
Reading a 1 indicates the
source of out of limit fault
Address
Select
1
1
1
1
Action
Lock AS0
Table 4. Status Register 5 (D4 through D7)
DTI = 1010, responds only when
address bits = A2 & A1 logic states
x
x
0
1
D7
MSB
Read1
Only
D6
D5
D4
D3
DTI = 1011, responds only when
address bits = A2 & A1 logic states
Read Read
Only Only
RTO1 RTO0
Action
0
1
x
x
Config. Reg. Read/Write enabled
Config. Reg. Read/Write locked out
1
1
1
1
1
0
0
1
1
0
1
0
1
x
x
x
x
x
x
x
x
tPRTO = 25ms
t
PRTO = 50ms
Note 1 - Setting this bit will cause a permanent Read/Write Lock out.
t
PRTO = 100ms
PRTO = 200ms
Table 7. Configuration Register 7 (D7, D6) Bits D5
through D0 are not used.
t
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. ]
