ARM7 datasheet(28/38 Pages) PHILIPS

28 / 38 page

9397 750 14985

Preliminary data sheet

Rev. 01 — 3 October 2005

28 of 38

Philips Semiconductors

LPC2141/42/44/46/48

Single-chip 16-bit/32-bit microcontrollers

[1]

Typical ratings are not guaranteed. The values listed are at room temperature (+25 ˚C), nominal supply voltages.

[2]

Core and external rail.

[3]

The RTC typically fails when Vi(VBAT) drops below 1.6 V.

[4]

Including voltage on outputs in 3-state mode.

[5]

VDD supply voltages must be present.

[6]

3-state outputs go into 3-state mode when VDD is grounded.

[7]

Accounts for 100 mV voltage drop in all supply lines.

[8]

Only allowed for a short time period.

[9]

Minimum condition for VI = 4.5 V, maximum condition for VI = 5.5 V.

[10] Applies to P1.16 to P1.31.

[11] On pin VBAT.

[12] Optimized for low battery consumption.

[13] To VSS.

[14] Includes external resistors of 18

Ω 1 % on D+ and D−.

[1]

Conditions: VSSA =0V, VDDA = 3.3 V.

[2]

The ADC is monotonic, there are no missing codes.

[3]

The differential linearity error (ED) is the difference between the actual step width and the ideal step width. See Figure 6.

[4]

The integral non-linearity (EL(adj)) is the peak difference between the center of the steps of the actual and the ideal transfer curve after

appropriate adjustment of gain and offset errors. See Figure 6.

[5]

The offset error (EO) is the absolute difference between the straight line which ﬁts the actual curve and the straight line which ﬁts the

ideal curve. See Figure 6.

[6]

The gain error (EG) is the relative difference in percent between the straight line ﬁtting the actual transfer curve after removing offset

error, and the straight line which ﬁts the ideal transfer curve. See Figure 6.

VOL

LOW output level

RL of 1.5 kΩ to 3.6 V

0.3

VOH

HIGH output level

RL of 15 kΩ to GND

2.8

3.6

Ctrans

transceiver capacitance

pin to GND

ZDRV

driver output impedance

for driver which is not

high-speed capable

steady state drive

[14] 29

Ω

Rpu

pull-up resistance

SoftConnect = ON

1.1

1.9

Ω

Table 5:

Static characteristics …continued

Ta = −40 °C to +85 °C for commercial applications, unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ [1]

Max

Unit

Table 6:

ADC static characteristics

VDDA = 2.5 V to 3.6 V; Ta = −40 °C to +85 °C unless otherwise speciﬁed. ADC frequency 4.5 MHz.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Via

analog input voltage

VDDA

Cia

analog input capacitance

differential linearity error

[1] [2] [3] --

±1

LSB

EL(adj)

integral non-linearity

[1] [4] --

±2

LSB

offset error

[1] [5] --

±3

LSB

gain error

[1] [6] --

±0.5

absolute error

[1] [7] --

±4

LSB

Rvsi

voltage source interface

resistance

[8] --40

Ω

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