DS80C320-ECD DALLAS [Dallas Semiconductor], DS80C320-ECD Datasheet - Page 164

• Manufacturer Part Number: DS80C320-ECD
• Description: High-Speed Microcontroller User Guide
• Manufacturer: DALLAS [Dallas Semiconductor]

The registers shown in Table 15-2 are battery-backed, and one or more bits will be indeterminate
following a no-battery reset. They should be initialized as part of a no-battery reset procedure.
BATTERY BACKED SFRS Table 15-2
LITHIUM BATTERY CONSIDERATIONS
Lithium primary (non-rechargeable) batteries can fail and/or rupture if subjected to reverse current from
the device they are powering. The battery-switching circuitry inside the DS87C530 was designed to
reduce or eliminate the need for external hardware required to meet battery safety regulations. As shown
in the DS87C530 Data Sheet, a current limiting resistor is always in series with a switching field-effect
transistor, regardless of whether the DS87C530 is drawing current from V
the two mechanism requirement of most safety codes.
REGISTER NAME
RTCD0
RTCD1
RTASS
RTCSS
RTAM
RTCM
RTAH
RTCC
RTCH
TRIM
RTAS
RTCS
LOCATION
FAh
FBh
FCh
FDh
F2h
F3h
F4h
F5h
F9h
FEh
FFh
96h
164 of 175
High-Speed Microcontroller User’s Guide
CC
or V
BAT
pins. This satisfies