DS5003FPM-16+ Maxim Integrated Products, DS5003FPM-16+ Datasheet - Page 23

• Manufacturer Part Number: DS5003FPM-16+
• Description: IC MICROPROCESSOR SECURE 80-MQFP
• Manufacturer: Maxim Integrated Products
• Series: DS500xr

Specifications of DS5003FPM-16+

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, SIO, UART/USART
• Peripherals: Power-Fail Reset, WDT
• Number Of I /o: 32
• Program Memory Type: SRAM
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 80-MQFP, 80-PQFP
• Processor Series: DS5003
• Core: 8051
• Data Bus Width: 8 bit
• Program Memory Size: 32 KB, 64 KB, 128 KB
• Data Ram Size: 32 KB, 64 KB, 128 KB
• Interface Type: UART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 2
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

The DS5003 monitors V
early warning power-fail interrupt, and switchover to
lithium backup. It uses an internal bandgap reference
in determining the switch points. These are called
V
below V
vectors to location 2Bh if the power-fail warning was
enabled. Full processor operation continues regard-
less. When power falls further to V
invokes a reset state. No further code execution is per-
formed unless power rises back above V
decoded chip enables and the R/W signal go to an
inactive (logic 1) state. V
this time. When V
circuitry switches to the lithium cell for power. The
majority of internal circuits are disabled and the remain-
ing nonvolatile states are retained. Any devices con-
Figure 14. Connection to 64kB x 8 SRAM
PFW
, V
CCMIN
PFW
, the DS5003 performs an interrupt and
LITHIUM
, and V
+3V
CC
______________________________________________________________________________________
+5V
+5V
drops further to below V
LI
, respectively. When V
Power Management
CC
13
54
14
CC
V
V
PORT 0
PORT 1
PORT 2
PORT 3
MSEL
to provide power-fail reset,
CC
LI
is still the power source at
DS5003
CCMIN
BA14–BA0
BD7–BD0
, the DS5003
V
GND
R/W
CCO
CE1
CE2
CCMIN
LI
CC
12
10
74
2
52
, internal
Secure Microprocessor Chip
drops
. All
nected to V
time. V
approximately 0.45V (less a diode drop), depending on
the load. Low-power SRAMs should be used for this
reason. When using the DS5003, the user must select
the appropriate battery to match the SRAM data-reten-
tion current and the desired backup lifetime. Note that
the lithium cell is only loaded when V
Secure Microcontroller User’s Guide has more informa-
tion on this topic. The trip points V
listed in the electrical specifications.
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
PACKAGE TYPE
80 MQFP
CCO
CCO
28
27
20
14
28
27
20
14
is at the lithium battery voltage minus
V
WE
CS
A14–A0
D7–D0
GND
V
WE
CS
A14–A0
D7–D0
GND
CC
CC
are powered by the lithium cell at this
PACKAGE CODE
32kB x 8 SRAM
32kB x 8 SRAM
Package Information
M80+2
OE
OE
22
22
CCMIN
DOCUMENT NO.
CC
and V
21-0271
< V
PFW
LI
. The
are
23