Motorola APX 5000 Service Manual page 271

Troubleshooting Tables: List of Board and IC Signals
Table 7-12. Overall GPIO pin functions across multiple boards (Continued)
Signal Name
RF_BRD_ID_BI RF Board ID bit 0
T_0
ATTENUATORS Controls the front end
_ON attenuators for both VHF
and 7/800 MHz, but
NOT in Tx. The
peregrine switch does
not have a mode where
it can be placed in TX
while attenuating the RX
path.
RF_BRD_ID_BI RF Board ID bit 1
T_1
UNUSED1 Not connected.
RF_BRD_ID_BI RF Board ID bit 2
T_2
REMOTE_ANTE Remote antenna select
NNA_ACTIVE
H66_H68_PATH Selects path for VHF
_ACTIVE transmit, UR1 and UR2.
800RX_FRONT_ Enables the 800 path in
END_ACTIVE the RX front end.
ALL_TX_ONLY_ Enables RF path 1
EXCEPT_VHF_ (VCO page). On for all
TX transmit modes except
VHF transmit. Off for all
RX modes
H66_VCO_PATH selects H66 VCOs path
_ON
NONE OMAP GPIO1
determines 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. PD on PCB
Pin
Description or
Ball #
16
17
18
19
21
22
23
25
27
29
R19
Y4
SW Initialized
Active
State
Direction
1 Input
1 Output
1 Input
1 Output
1 Input
1 Output
1 Output
1 Output
1 Output
1 Output
Input
Output
HW Reset
*
PU State Direction
PU Input
Input
PU Input
Input
PU Input
Input
Input
Input
Input
Input
PD 0 Input
None 0 Output
7-21
*
PU
or
PD
None
None
None
None
None
None
None
None
None
None
PD
None