P2040 QorIQ Integrated Processor Hardware Specifications

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Hardware Design Considerations isolation resistor will allow future access to TRST in case a JTAG interface may need to be wired onto the system in future debug situations. • No pull-up/pull-down is required for TDI, TMS, or TDO. COP_TDO 1 2 NC COP_TDI 3 4 COP_TRST NC 5 6 COP_VDD_SENSE COP_TCK 7 8 COP_CHKSTP_IN COP_TMS 9 10 NC COP_SRESET 11 12 NC COP_HRESET 13 KEY No pin COP_CHKSTP_OUT 15 16 GND Figure 54. Legacy COP Connector Physical Pinout P2040 QorIQ Integrated Processor Hardware Specifications, Rev. 0 122 Freescale Semiconductor
Hardware Design Considerations OV DD From Target Board Sources (if any) HRESET PORESET 7 10 kΩ HRESET 6 10 kΩ PORESET 1 13 11 COP_HRESET COP_SRESET B A 10 kΩ 10 kΩ 5 10 kΩ 1 2 3 5 4 6 4 6 5 COP_TRST COP_VDD_SENSE 2 NC 10 Ω 10 kΩ TRST 1 7 9 11 13 15 8 10 12 KEY No pin 16 COP Connector Physical Pinout COP Header COP_CHKSTP_OUT 15 14 3 COP_CHKSTP_IN 8 COP_TMS 9 COP_TDO 1 COP_TDI 3 COP_TCK 7 System logic 10 kΩ 10 kΩ CKSTP_OUT TMS TDO TDI TCK 2 NC 10 NC 12 4 16 Notes: 1. The COP port and target board must be able to independently assert PORESET and TRST to the processor in order to fully control the processor as shown here. 2. Populate this with a 10 Ω resistor for short-circuit/current-limiting protection. 3. The KEY location (pin 14) is not physically present on the COP header. 4. Although pin 12 is defined as a No-Connect, some debug tools may use pin 12 as an additional GND pin for improved signal integrity. 5.This switch is included as a precaution for BSDL testing. The switch must be closed to position A during BSDL testing to avoid accidentally asserting the TRST line. If BSDL testing is not being performed, this switch must be closed to position B. 6. Asserting HRESET causes a hard reset on the device. 7. This is an open-drain gate. Figure 55. Legacy JTAG Interface Connection P2040 QorIQ Integrated Processor Hardware Specifications, Rev. 0 Freescale Semiconductor 123
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P2040 QorIQ Integrated Processor Hardware Specifications

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