Good mapping for JTAG TMS pin on Teensy 3.6

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ananya

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Hi,

I want to use the Teensy 3.6 as a JTAG device to debug an external ARM microprocessor.

I decided to use a combination of SPI and bit-banging on the Teensy to send and receive JTAG signals. This led to the map:

JTAG TMS - ?
JTAG TDO - Teensy MOSI0 (pin 11)
JTAG TDI - Teensy MISO0 (pin 12)
JTAG TCK - Teensy SCK0 (pin 13)

What is a good pin to send out JTAG TMS? I was thinking CS0 pin 10 but am not sure.

Best regards,
Ananya
 
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