Motorola APX 5000 Service Manual page 272

7-22
Table 7-12. Overall GPIO pin functions across multiple boards (Continued)
Signal Name
OMAP_MPU_B Pin pulled high on PCB
OOT to select external boot
on EMIFS CS3 (flash
memory)
RESET_MODE Determines reset mode
of OMAP. Latched on
rising edge of
PWR_ON_RESET.
Pulled low on PCB
(mode 0).
MAKO_RESETX Master cold reset input
for entire 1710 chip,
controlled by Mako IC
MAKO_RESETX MPU (ARM9)
subsystem reset input,
tied to PWRON_RESET
(R12) on PCB
OMAP_RESET Reset output from
OMAP used for
CODEC, CPLD, Front
Display, Lighting
Controllers, MACE
Tamper ckt.
MMC2_CLOCK Clock for expanded
memory (e-MMC)
MMC2_CLOCK_ Clock feedback for
FEEDBACK expanded memory (e-
MMC)
MMC2_COMMA Command for expanded
ND memory (e-MMC)
MMC2_DATA_0 Data 0 for expanded
memory (e-MMC)
MMC2_DATA_1 Data 1 for expanded
memory (e-MMC)
MMC2_DATA_2 Data 2 for expanded
memory (e-MMC)
MMC2_DATA_3 Data 3 for expanded
memory (e-MMC)
UART1_TX UART1 Serial Transmit
Data
Pin
Description or
Ball #
J20
P12
R12
U20
AA20
Y10
R18
Y8
W8
V8
W15
R10
Y14
Troubleshooting Tables: List of Board and IC Signals
SW Initialized
Active
State
Direction
Input
Input
0 Input
0 Input
0 Output
Output
Input
I/O
I/O
I/O
I/O
I/O
Output
HW Reset
*
PU State Direction
None 1 Input
None 0 Input
None Input
None Input
None 0 Output
PD Input
PD Input
PU Input
PU Input
PU Input
PU Input
PU Input
None 0 Output
*
PU
or
PD
None
None
None
None
None
PD
PD
PD
PD
PD
PD
PD
PD