ST72411R datasheet(61/71 Pages) STMICROELECTRONICS

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ST72411R

61/71

7.5 MEMORY CHARACTERISTICS

Subject to general operating conditions for VDD,fOSC, and TA unless otherwise specified.

7.5.1 RAM and Hardware Registers

7.5.2 FLASH Program Memory

Notes:

1. Minimum VDD supply voltage without losing data stored in RAM (in in HALT mode or under RESET) or in hardware

registers (only in HALT mode). Guaranteed by construction, not tested in production.

2. Up to 16 bytes can be programmed at a time for a 4kBytes FLASH block

3. The data retention time increases when the TA decreases.

4. Data based on reliability test results and monitored in production.

7.6 LCD ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings (Voltage Referenced to V

SS)

Note: Electrical simulations on design database and product characterization will be done over [0 to

+70

°C] temperature range.

(T = 0... +70

oC, V

DD -VSS = 6 V unless otherwise specified)

Notes:

1) The DC offset voltage refers to all segment and common outputs. It is the interface between the measured voltage

value and nominal value for every voltage level. Ri of voltage meter must be greater than or equal to 10MW.

2) Target value to be confirmed after product characterisation.

Symbol

Parameter

Conditi ons

Min

Typ

Max

Unit

VRM

Data retention mode 1)

HALT mode (or RESET)

1.6

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

tprog

Programming time for 1~16 bytes 2) TA=+25°C8

Programming time for 4 KBytes

TA=+25°C

2.1

6.4

sec

tret

Data retention 4)

TA=+55°C

years

NRW

Write erase cycles 4)

TA=+25°C

100

cycles

Symbol

Ratings

Value

Unit

VLCD

Max. Display Voltage

Note: VLCD=VDD

6.6

IVDDP_i -IVSSP_i

Total current into VDDP_i/VSSP_i

80/80

LCD DRIVER

Symbol

Parameter

Condit ions

Min(2)

Typ(2)

Max(2)

Unit

fFR

Frame frequency

fRCINT=7.16 MHz

437

fOSC=8 MHz

488

VOS

DC Offset Voltage (1)

VLCD=VDD no load

VCOH

COM High Level, Output Voltage

I=100

µA, V

LCD=5V

4.5

VCOL

COM Low Level, Output Voltage

I=50

µA, V

LCD=5V

0.5

VSOH

SEG High Level, Output Voltage

I=50

µA, V

LCD=5V

4.5

VSOL

SEG Low Level, Output Voltage

I=100

µA, V

LCD=5V

0.5

VLCD

Display Voltage

VLCD =VDD

4.5

6.6

CLOAD

LCD dot Load

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