User's Manual

Table Of Contents

1323x-Modular Reference Board

1323x Development Hardware Reference Manual, Rev. 1.0

3-14 Freescale Semiconductor

3.3.3.2 IR Transmitter (Blaster)

An IR transmitter or blaster is provided to control IR legacy components (see Figure 3-10).

• The IR power supply is V_LED (Header J9, Pin 7-8)

• The IR transmitter has approximately a 10 meter range.

• Current draw is approximately 80 mA when active.

• To reduce the peak current consumption, it is recommended that the IR transmitter only be active

when the MC1323x RF transceiver is in-active.

• When using the blaster in an application, observe proper orientation (see Figure 3-2)

Figure 3-10. IR Transmitter Circuit

INFRARED LED

V_LED

MRB-PTD4/CMT

18.2

TP9TP9

VSLB3940

27K

1.5K

TP8TP8

MMBT3904LT1G

2 3

TP7TP7