Table 7-18. Overall Gpio Pin Functions - Motorola APX 1000 Detailed Service Manual

7-46
7.1.3 APX 2000/ APX 4000/ APX 4000Li and APX 2000/ APX 4000 (Two Knobs)
Signal Name
NC NC
codec_cs DSP SPI chip select
for TI dual CODEC
abacus_cs DSP SPI chipselect
for Abacus IC
trident_cs DSP SPI chipselect
for Trident IC
synthesizer_lock RF synthesizer lock
detect
f2_timer_dmcs Timer output com-
pare for DMCS or
SYNCB
mako_tx_rx Trigger for Mako DAC
ramp
On_Off_Switch** Radio On_Off detec-
tion
option_spi_cs Option board SPI
chip select
dac_cs RF DAC chip select
push_to_talk Push to talk button
input
mako_intx Mako main interrupt
mako_usb_intx Mako USB interrupt
mako_option_intx Mako Option interrupt
Unused and Unwired
OMAP Pin
top_display_cs Top LCD SPI chip
select
Unused and Unwired
OMAP Pin
mako_cs Mako IC SPI chip
select

Table 7-18. Overall GPIO pin functions

Pin
Description or
Ball #
M8
Y1
L3
V6
V15
M20
L14
G19
W9
T19
T20
P15
AA9
Y12
M14
P3
V19
N15
Troubleshooting Tables: List of Board and IC Signals
SW Initialized
Active
State
Direction
Output
0 Output
0 Output
0 Output
1=Lock Input
1 Output
1=TX Output
0 Output
0 Output
0 Output
0 Input
0 Input
0 Input
0 Input
Input
0 Output
Output
1 Output
HW Reset
*
PU State Direction
0 Output
1 Output
0 Output
0 Output
None Input
Input
*Input
0 Output
0 Output
Input
None Input
None Input
None Input
None Input
Pull- Input
down
1 Output
0 Output
Input
*
PU
or
PD
None
Pull-
down
None
Pull-
down
Pull-
down
None
Pull-
down
None
Pull-
down
Pull-
down