7-30 Troubleshooting Tables: List of Board and IC Signals
spi_dsp_clk DSP SPI Clock from
OMAP
N14 I/O Pull-
down
Input None
spi_dsp_mosi DSP SPI Data from
OMAP
P14 Output Pull-
down
Input Pull-
down
spi_dsp_miso DSP SPI Data into
OMAP
AA17 Input Pull-
down
Input Pull-
down
gps_uart_tx UART Data from OMAP
to GPS IC
M18 Output None 0 Output Pull-
down
gps_uart_rx UART Data from GPS
IC to OMAP
R9 Input Pul-
lup
Input Pull-
down
16.8_mhz_clk Timer Reference Clock
Input
N18 Input None Input Pull-
down
trident_ssi[0] Transmit SSI Clock from
RF Board
Y6 Input Pull-
down
Input Pull-
down
trident_ssi[1] Transmit SSI Frame
Sync from RF Board
W7 Input Pull-
down
Input Pull-
down
trident_ssi[2] Transmit SSI Data from
OMAP
AA5 Output Pull-
down
0 Output Pull-
down
abacus_ssi[0] Receive SSI Clock from
RF Board
V7 I/O Pull-
down
Input None
abacus_ssi[1] Receive SSI Frame
Sync from RF Board
W6 I/O Pull-
down
Input None
abacus_ssi[2] Receive SSI Data from
RF Board
P10 Input Pull-
down
Input Pull-
down
scl I2C Clock T18 I/O None Input None
sda I2C Data V20 I/O None Input None
rtck JTAG Clock from Con-
troller
Y17 I/O None U Unknown None
tck JTAG Clock from JTAG
box to Controller
W18 Input None Input Pull-
down
ntrst JTAG Reset from JTAG
box
Y18 Input None Input
omap_tms JTAG Test Mode Select
from JTAG box
V17 Input Input Pull-
down
omap_tdo JTAG Data out from
Controller
AA19 Output 0 Output None
Table 7-10. Overall GPIO pin functions (Continued)
Signal Name Description
Pin
or
Ball #
Active
State
SW Initialized HW Reset
Direction
*
PU State Direction
*
PU
or
PD
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