NXP Semiconductors TWR-S08, Руководство пользователя, Страница: 14 / 19

T W R - S 0 8 L L / L H U S E R G U I D E A P R I L 2 7 , 2 0 1 0
U S E R G U I D E
14
Figure 10: Pushbutton Switch Signal Connections
Signal
SW1 PTA6/KBIP6
SW2 PTA7/KBIP7
SW3 PTA0/KBIP0
SW4 PTB6
CAUTION:
SW1 and RZ1 share a common MCU signal input. If both components are
enabled at the same time, SW 1 may not function properly.
User LED’s
The TWR-S08 target board provides 4, green, LEDs for output indication. Each LED is
configured for active-low operation. A series, current-limit resistor prevents excessive diode
current. Figure 11 below shows the USER2 enable position and associated signal for each
user LED.
Figure 11: USER2 Option Header, JP11
Signal ON OFF
 
LED1
PTC2/TPM1CH0 Enabled (*) Disabled
 
LED2
PTC3/TPM1CH1 Enabled (*) Disabled
 
LED3
PTC4/TPM2CH0 Enabled (*) Disabled
 
LED4
PTC5/TPM2CH1 Enabled (*) Disabled
JP11
(*)
– Default Position
Potentiometer
The TWR-S08 board provides a 5K ohm potentiometer (POT) to simulate analog input. The
POT is decoupled to minimize noise during adjustment. Figure 12 below shows the USER
enable position and associated signal for the buzzer.
Figure 12: POT Enable Option Header, JP12
Signal ON OFF
 
PTA0/ADP4 Enabled (*) Disabled
JP12
(*)
– Default Position