LPC1850 datasheet(105/157 Pages) PHILIPS

105 / 157 page

LPC1850_30_20_10

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Preliminary data sheet

Rev. 3 — 6 December 2011

105 of 157

NXP Semiconductors

LPC1850/30/20/10

32-bit ARM Cortex-M3 microcontroller

11.4 IRC and RTC 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.

11.5 I2C-bus

Table 12.

Dynamic characteristic: IRC and RTC oscillators

Tamb = 40 C to +85 C; 2.2 V  VDD(REG)(3V3)  3.6 V.[1]

Symbol

Parameter

Conditions

Min

Typ[2]

Max

Unit

fosc(RC)

internal RC oscillator

frequency

11.88

12.12

MHz

fi(RTC)

RTC input frequency

32.768

kHz

Conditions: Frequency values are typical values.

Fig 23. Internal RC oscillator frequency versus temperature

<tbd>

X (X)

001aab173

(X)

Table 13.

Dynamic characteristic: I2C-bus pins

Tamb = 40 C to +85 C; 2.2 V  VDD(REG)(3V3)  3.6 V.[1]

Symbol

Parameter

Conditions

Min

Max

Unit

fSCL

SCL clock frequency

Standard-mode

100

kHz

Fast-mode

400

kHz

Fast-mode Plus

MHz

fall time

[3][4][5][6]

of both SDA and

SCL signals

Standard-mode

300

Fast-mode

20 + 0.1

 C

300

Fast-mode Plus

120

tLOW

LOW period of the SCL clock

Standard-mode

4.7

s

Fast-mode

1.3

s

Fast-mode Plus

0.5

s

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