LPC1763 datasheet(53/79 Pages) NXP

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LPC1769_68_67_66_65_64_63

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Product data sheet

Rev. 7 — 5 April 2011

53 of 79

NXP Semiconductors

LPC1769/68/67/66/65/64/63

32-bit ARM Cortex-M3 microcontroller

11. Dynamic characteristics

11.1 Flash memory

[1]

Number of program/erase cycles.

[2]

Programming times are given for writing 256 bytes from RAM to the flash. Data must be written to the flash in blocks of 256 bytes.

11.2 External clock

[1]

Parameters are valid over operating temperature range unless otherwise specified.

[2]

Typical ratings are not guaranteed. The values listed are at room temperature (25

°C), nominal supply voltages.

Table 9.

Flash characteristics

Tamb = −40 °C to +85 °C, unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Nendu

endurance

[1] 10000

100000

cycles

tret

retention time

powered

years

unpowered

years

ter

erase time

sector or multiple

consecutive sectors

100

105

tprog

programming time

[2] 0.95

1.05

Table 10.

Dynamic characteristic: external clock

Tamb = −40 °C to +85 °C; VDD(3V3) over specified ranges.[1]

Symbol

Parameter

Conditions

Min

Typ[2]

Max

Unit

fosc

oscillator frequency

MHz

Tcy(clk)

clock cycle time

1000

tCHCX

clock HIGH time

Tcy(clk) × 0.4

tCLCX

clock LOW time

Tcy(clk) × 0.4

tCLCH

clock rise time

tCHCL

clock fall time

Fig 15. External clock timing (with an amplitude of at least Vi(RMS) = 200 mV)

tCHCL

tCLCX

tCHCX

Tcy(clk)

tCLCH

002aaa907

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