LPC1313 datasheet(41/53 Pages) NXP

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LPC1311_13_42_43_1

Product data sheet

Rev. 01 — 11 December 2009

41 of 53

NXP Semiconductors

LPC1311/13/42/43

32-bit ARM Cortex-M3 microcontroller

10.3 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.

10.4 I2C-bus

[1]

Parameters are valid over operating temperature range unless otherwise speciﬁed.

[2]

Main clock frequency 10 MHz; system clock divider AHBCLKDIV = 0x1; I2C-bus interface conﬁgured in master mode.

[3]

Bus capacitance Cb = 550 pF; external pull-up resistance of 103 Ω.

Table 13.

Dynamic characteristic: internal oscillators

Tamb = −40 °C to +85 °C; 2.7 V ≤ VDD(3V3) ≤ 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(3V3) ≤ 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 21. Internal RC oscillator frequency f versus temperature

temperature (

°C)

−40

−15

002aae987

11.95

12.05

12.15

(MHz)

11.85

VDD(3V3) = 3.6 V

3.3 V

3.0 V

2.7 V

2.4 V

2.0 V

Table 14.

Dynamic characteristic: I2C-bus pins (Fast-mode Plus)

Tamb = −40 °C to +85 °C; VDD(3V3) = VDD(IO) = 3.3 V.[1][2][3]

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fSCL

SCL clock frequency

MHz

fall time

tSU;DAT

data set-up time

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