User's Manual

1323x Remote Extender Motherboard
1323x Development Hardware Reference Manual, Rev. 1.0
Freescale Semiconductor 5-7
Again referring to Figure 5-3, a number of zero-ohm resistors are provided to isolate different circuits and
to allow current measurement:
• VCC (main 1323x-REM supply) - resistor R35
• V_LED (all LEDs supply) - resistor R36
• V_IRX (IR receiver supply) - resistor R40
• V_MRB (1323x-MRB supply) - resistor R43
Figure 5-4. 1323x-MRB Mounted on 1323x-REM
5.2.2 GPIO Connection to 1323x-MRB
IO Connectors J8 and J9 (see Figure 5-1) are receptacles that accept the 1323x-MRB pin headers to mount
the daughtercard. Figure 5-4 shows the 1323x-REM with the 1323x-MRB mounted. Receptacles J8 and
J9 connect to the MC13233 GPIO.
To provide better access and versatility to the GPIO, a secondary set of pin headers P1 and P2 is connected
in series with the IO signals:
• Jumpers must be installed on P1 and P2 to connect 1323x-REM peripherals and functions
• The pin headers provide direct access for connecting custom circuitry to the GPIO
• Power and ground to primary connectors J8 and J9 are not enabled though the pin headers
Figure 5-5 shows IO Header P1 andP2 pin mapping.