SPEAR1340 datasheet(149/200 Pages) STMICROELECTRONICS

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SPEAr1340

Electrical characteristics

Doc ID 023063 Rev 4

149/200

4.10

Reset release

The master reset (MRESETn) must be released after all the power supplies are stable and

for a time interval of 2 ms, which is the start-up time of the main oscillator, and must be

asserted low for at least 1 µs for warm reset.

Figure 14.

Cold reset release

Figure 15.

Warm reset release

Note:

See also: Section 5.1: Reset timing characteristics on page 151.

4.11

ADC electrical characteristics

VDD 1V2

VDD

VDD 3V3

1V5/1V8

MRESETn

tRP(cold)= 2 ms

tRP(warm)= 500 ns

MRESETn

Table 57.

ADC characteristics

Symbol

Parameters

Min

Typ

Max

Unit

fADC_CLK

ADC_CLK frequency

2.5

MHz

AVDD

ADC supply voltage

2.25

2.5

2.75

VREFP

Positive reference voltage

2.5

2.75

VREFN

Negative reference voltage

0.7

VIREF

Internal reference voltage

1.95

2.05

tSTARTUP

Startup time

µs

VAIN

Input range (absolute)

AGND - 0.3

AVDD - 0.3

Conversion range

VREFN

VREFP

CAIN

Input capacitance

6.4

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