ds2252t Maxim Integrated Products, Inc., ds2252t Datasheet - Page 7

• Manufacturer Part Number: ds2252t
• Description: Ds2252t Secure Microcontroller Module
• Manufacturer: Maxim Integrated Products, Inc.

DS2252T MEMORY MAP WITH (PES = 1) Figure 4
POWER MANAGEMENT
The DS2252T monitors V
switchover to lithium backup. It uses an internal band-gap reference in determining the switch points.
These are called V
perform an interrupt vector to location 2Bh if the power-fail warning is enabled. Full processor operation
continues regardless. When power falls further to V
code execution will be performed unless power rises back above V
the R/
drops further to below V
majority of internal circuits will be disabled and the remaining nonvolatile states will be retained. The
Secure Microcontroller User’s Guide has more information on this topic. The trip points V
V
PFW
are listed in the electrical specifications.
W
signal go to an inactive (logic 1) state. V
PARTITION
FFFFh --
C000h --
B000h --
4000h --
0000h --
= NOT ACCESSIBLE
PFW
, V
PROGRAM MEMORY
CCMIN
LI
, internal circuitry will switch to the built-in lithium cell for power. The
CC
PROGRAM
NV RAM
, and V
to provide power-fail reset, early warning power-fail interrupt, and
LI
respectively. When V
7 of 16
CCMIN
CC
is still the power source at this time. When V
, the DS2252T invokes a reset state. No further
DATA MEMORY (MOVX)
CC
REAL-TIME
drops below V
CCMIN
CLOCK
. All decoded chip enables and
PFW
-- 64K
-- 16K
, the DS2252T will
CCMIN
and
CC