TWR-K70F120M Tower Module User's Manual
Page 17 of 25
J19
(revC
board)
50 MHz oscillator power
*ON*
Power supply to 50MHz oscillator enabled.
OFF
Power supply to 50MHz oscillator disabled.
J19
(revB
board)
50MHz clock disable.
*ON*
On-board 50MHz oscillator enabled. On-board 50 MHz clock
drives main EXTAL.
OFF
On-board 50MHz oscillator disabled. Off-board clock drives
main EXTAL.
NOTE: This option must be selected whenever a tower
module card that provides a clock on primary elevator pin
B24 is connected to the CPU module. Otherwise there will be
contention between the two clock sources.
J20
MCU VDD_INT Power
Connection
*ON*
Connect VDD and VDD_INT rails together
OFF
Isolate MCU VDD_INT from power supply (allows for
external supply or power measurements)
4
Input/Output Connectors and Pin Usage Table
The following table provides details on which K70FN1M0 pins are used to communicate with the LEDs,
switches, and other I/O interfaces onboard the TWR-K70F120M.
Note:
Some port pins are used in multiple interfaces on-board and many are potentially connected to
off-board resources via the Primary and Secondary Connectors. Take care to avoid attempted
simultaneous usage of mutually exclusive features.
Table 6.
I/O Connectors and Pin Usage Table
Feature
Connection
Port Pin
Pin Function
OSJTAG USB-to-
serial Bridge
OSJTAG Bridge RX Data
PTE17
UART2_RX
OSJTAG Bridge TX Data
PTE16
UART2_TX
SD Card Slot
SD Clock
PTE2
SDHC0_DCLK
SD Command
PTE3
SDHC0_CMD
SD Data0
PTE1
SDHC0_D0
SD Data1
PTE0
SDHC0_D1
SD Data2
PTE5
SDHC0_D2
SD Data3
PTE4
SDHC0_D3
SD Card Detect
PTE28
PTE28
Infrared Port
IR Transmit
PTD7
CMT_IRO
IR Receive
―
CMP2_IN3
Pushbuttons
SW1 (IRQ0)
PTD0
PTD0
SW2 (IRQ1)
PTE26
PTE26
SW3 (RESET)
RESET_b RESET_b
Touch Pads
E1 / Touch
PTA4
TSI0_CH5
E2 / Touch
PTB3
TSI0_CH8
E3 / Touch
PTB2
TSI0_CH7
E4 / Touch
PTB16
TSI0_CH9
