Motorola APX 1000 Detailed Service Manual page 276

7-50
Signal Name
none OMAP GPIO1 deter-
mines default state of
some EMIFS pins.
Latched on rising
edge of
PWR_ON_RESET.
Pulled low on PCB
none "Unused, defaults to
UART2.BCLK in reset
mode 0. Pulldown on
PCB
omap_mpu_boot Pin pulled high on
PCB to select exter-
nal 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) sub-
system reset input,
tied to
PWRON_RESET
(R12) on PCB
omap_reset "Reset output from
OMAP used for
CODEC, CPLD,
Front Display, Light-
ing Controllers,
MACE Tamper ckt.
RSW_Int** Rotary Interrupt to
OMAP
RSW_A** Rotary knob input to
OMAP
RSW_B** Rotary knob input to
OMAP
Table 7-18. Overall GPIO pin functions (Continued)
Pin
Description or
Ball #
R19
"Y4
J20
P12
"R12
"U20
"AA20
Y10
V11
R11
Troubleshooting Tables: List of Board and IC Signals
SW Initialized
Active
State
Direction
Input
Output
Input
Input
0 Input
0 Input
0 Output
Input
Input
Input
HW Reset
*
PU State Direction
Pull- 0 Input
down
None 0 Output
None 1 Input
None 0 Input
None Input
None Input
None 0 Output
Pull- Input
down
Pull- Input
down
Pull- Input
down
*
PU
or
PD
Pull-
down
None
None
None
None
None
None
Pull-
down
Pull-
down
Pull-
down