MAXQ2000-RFX+ datasheet(4/39 Pages) MAXIM

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Low-Power LCD Microcontroller

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ELECTRICAL CHARACTERISTICS (continued)

(VDD = VDD(MIN) to VDD(MAX), VDDIO = 2.7V to 3.6V, TA = -40°C to +85°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

EXTERNAL CLOCK SOURCE

External oscillator, VDD

2.25V

External oscillator, VDD < 2.25V

External crystal, VDD

2.25V

External crystal, VDD < 2.25V

Flash programming, VDD

2.25V

External-Clock

Frequency

fHFIN

Flash programming, VDD < 2.25V

MHz

External-Clock Period

tCLCL

48% minimum duty cycle

2.25V

VDD

2.75V

System-Clock Frequency

fCK

1.8V

VDD

2.75V

MHz

System-Clock Period

tCK

REAL-TIME CLOCK

RTC Input Frequency

f32KIN

32kHz watch crystal

32.768

kHz

JTAG/FLASH PROGRAMMING

Mass erase

200

Flash Erase Time

Page erase

Flash Programming Time

2.5

5.0

Write/Erase Cycles

TA = +25°C

10,000

cycles

Data Retention

TA = +25°C

100

years

SPI TIMING

SPI Master Operating

Frequency

1/tMCK

fCK / 2

MHz

SPI Slave Operating

Frequency

1/tSCK

fCK / 8

MHz

SCLK Output Pulse-Width

High/Low

tMCH, tMCL

tMCK / 2

- 25

SCLK Input Pulse-Width

High/Low

tSCH, tSCL

tSCK / 2

MOSI Output Hold Time

after SCLK Sample Edge

tMOH

CL = 50pF

tMCK / 2

- 25

MOSI Output Valid to

Sample Edge

tMOV

tMCK / 2

- 25

MISO Input Valid to SCLK

Sample Edge Rise/Fall

Setup

tMIS

MISO Input to SCLK

Sample Edge Rise/Fall

Hold

tMIH

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