LPC1102 datasheet(28/39 Pages) NXP

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LPC1102

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Product data sheet

Rev. 4 — 24 June 2011

28 of 39

NXP Semiconductors

LPC1102

32-bit ARM Cortex-M0 microcontroller

10.4 Internal oscillators

[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.

[1]

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

C), nominal supply

voltages.

[2]

The typical frequency spread over processing and temperature (Tamb = 40 C to +85 C) is 40 %.

[3]

See the LPC1102 user manual.

Table 11.

Dynamic characteristic: internal oscillators

Tamb = 40 C to +85 C; 2.7 V  VDD  3.6 V.[1]

Symbol

Parameter

Conditions

Min

Typ[2]

Max

Unit

fosc(RC)

internal RC oscillator frequency -

11.88

12.12

MHz

Conditions: Frequency values are typical values. 12 MHz

 1 % accuracy is guaranteed for

2.7 V

 V

DD  3.6 V and Tamb = 40 C to +85 C. Variations between parts may cause the IRC to

fall outside the 12 MHz

 1 % accuracy specification for voltages below 2.7 V.

Fig 16. Internal RC oscillator frequency versus temperature

Table 12.

Dynamic characteristics: Watchdog oscillator

Symbol Parameter

Conditions

Min

Typ[1]

Max

Unit

fosc(int)

internal oscillator

frequency

DIVSEL = 0x1F, FREQSEL = 0x1

in the WDTOSCCTRL register;

[2][3] -7.8

kHz

DIVSEL = 0x00, FREQSEL = 0xF

in the WDTOSCCTRL register

[2][3] -

1700

kHz

002aaf403

11.95

12.05

12.15

(MHz)

11.85

temperature (

°C)

−40

−15

VDD = 3.6 V

3.3 V

3.0 V

2.7 V

2.4 V

2.0 V

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