Siemens HC15 Spezifikationen PDF herunterladen (Seite 43)

HC15 Hardware Interface Description

5.5 Pin Assignment and Signal Description

HC15_HD_v01.000 Page 43 of 67 2007-1-19

Confidential / Released

The following table describes the signal pins available over the application interface via the board-to-board inter-

face.

Table 16: Signal description

Function Signal name IO Signal form and level Comment

Power supply BATT+ I V

max = 4.2V

norm = 3.8V

min = 3.2V during Tx burst (GSM) on

board

≈ 2A, during Tx burst (GSM)

n Tx = n x 577µs peak current every

4.616ms

Pins of BATT+ and GND

must be connected in par-

allel for supply purposes

because higher peak cur-

rents may occur.

Minimum voltage must not

fall below 3.2V including

drop, ripple, spikes.

Overvoltage shutdown

takes effect if BATT+ =

4.3V ± 2%.

Power supply GND Ground Application Ground

External sup-

ply voltage

VEXT O V

typ = 2.6V ± 3%

max = 50mA

VEXT may be used for

application circuits.

If unused keep pin open.

Not available in Power-

down mode. The external

digital logic must not cause

any spikes or glitches on

voltage VEXT.

Power indica-

tor

PWR_IND O V

max = 10V

max = 0.4V at Imax = 2mA

PWR_IND (Power Indica-

tor) notifies the module’s

on/off state.

PWR_IND is an open col-

lector that needs to be con-

nected to an external pull-

up resistor. Low state of

the open collector indi-

cates that the module is

on. Vice versa, high level

notifies the power-down

mode.

Therefore, the pin may be

used to enable external

voltage regulators which

supply an external logic for

communication with the

module, e.g. level convert-

ers.

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 66 67

Kommentare zu diesen Handbüchern

Keine Kommentare

Siemens HC15 Spezifikationen Seite 43

Kommentare zu diesen Handbüchern