diff --git a/armjtag/README b/armjtag/README index 21ae5e4..ac364b4 100644 --- a/armjtag/README +++ b/armjtag/README @@ -19,15 +19,26 @@ http://www.sparkfun.com/products/9140 http://www.sparkfun.com/products/9385 The signal name, gpio pins, schematic name, connector pin -and direction shown here +and direction shown here. When looking into the holes of an arm +20 pin (female) jtag connector. There should be a key or bit of plastic +almost two holes wide on one side. With that key pointed up, looking +into the holes pin one is the top left corner. The arm jtag names +on the left of this list start with pin 1 and go along that side of +the connector in order. For ground use any one of the holes on the +other side except the lower left, pin 2, that is not a ground. -ARM_VREF P1-1 -ARM_TRST 22 GPIO_GEN3 P1-15 IN (22 ALT4) -ARM_TDO 5/24 GPIO_GEN5 P1-18 OUT (24 ALT4) -ARM_TCK 13/25 GPIO_GEN6 P1-22 OUT (25 ALT4) -ARM_TDI 4/26 GPIO_GCLK P1-7 IN ( 4 ALT5) -ARM_TMS 12/27 CAM_GPIO S5-11 OUT (27 ALT4) -ARM_GND P1-25 +See this page as an example +http://www.amontec.com/jtag_pinout.shtml + +1 ARM_VREF P1-1 +2 ARM_TRST 22 GPIO_GEN3 P1-15 IN (22 ALT4) +3 ARM_TDI 4/26 GPIO_GCLK P1-7 IN ( 4 ALT5) +4 ARM_TMS 12/27 CAM_GPIO S5-11 OUT (27 ALT4) +5 ARM_TCK 13/25 GPIO_GEN6 P1-22 OUT (25 ALT4) +7 no connect +9 ARM_TDO 5/24 GPIO_GEN5 P1-18 OUT (24 ALT4) + +4-20 ARM_GND P1-25 In parenthesis is the gpio pin used and the alternate function setting needed in the GPIO to connect it to the edge of the BCM chip.