
Motorola Internal Use
21
A008 / A6188+ – Circuit Description
UPLINK / GCAP UPLINK
lines or for example Flash Information can be
programmed into either Processor using
DOWNLINK / GCAP_DOWNLINK
.
4)
IrDA – The IrDA transceiver module is
U9812
. The IrDA data takes the form of an
SIP (Serial Infrared Pulse) with
SD_IrDA
being an active high signal that turns the
LED on. The received signal
IrDA RXD
is always a pulsed, active low 2.4
µ
s pulse,
and a low will light the LED. The data for TX is sent to
IRDA_TXD
U9812
Pin 7
from
Dragon Ball
as
TXD2
Pin E4
. For
IRDA_RXD
, information received is passed
from
U9812
to Dragon Ball as
RXD2
Pin E3