MMC2107 - Freescale Semiconductor

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JTAG Test Access Port and OnCE Freescale Semiconductor, Inc. 21.14.16 OnCE Commands The OnCE commands can be classified as: • Read commands (the device delivers the required data) • Write commands (the device receives data and writes the data in one of the OnCE registers) • Commands with no associated data transfers nc... Freescale Semiconductor, I 21.14.17 Target Site Debug System Requirements A typical debug environment consists of a target system in which the MCU resides in the user-defined hardware. The external command controller acts as the medium between the MCU target system and a host computer. The external command controller circuit acts as a serial debug port driver and host computer command interpreter. The controller issues commands based on the host computer inputs from a user interface program which communicates with the user. 21.14.18 Interface Connector for JTAG/OnCE Serial Port Figure 21-16 shows the recommended connector pinout and interface requirements for debug controllers that access the JTAG/OnCE port. The connector has two rows of seven pins with 0.1-inch center-to-center spacing between pins in each row and each column. Technical Data MMC2107 – Rev. 2.0 582 JTAG Test Access Port and OnCE MOTOROLA For More Information On This Product, Go to: www.freescale.com
Freescale Semiconductor, Inc. JTAG Test Access Port and OnCE Functional Description TARGET V DD 10 kΩ TDI 1 2 GND TOP VIEW (0.1 INCH CENTER-TO-CENTER) nc... Freescale Semiconductor, I 10 kΩ 10 kΩ 10 kΩ WIRED OR WITH TARGET RESET CIRCUIT. THIS SIGNAL MUST BE ABLE TO ASSERT/MONITOR SYSTEM RESET. TDO TCLK GPIO/SI TARGET_RESET TARGET V DD GPIO/SO 3 4 5 6 7 8 9 10 11 12 13 14 KEY (No Connect) Figure 21-16. Recommended Connector Interface to JTAG/OnCE Port TMS DE TRST 10 kΩ 10 kΩ 10 kΩ Note: GPIO/SI and GPIO/SO are not required for OnCE operation at this time. These pins can be used for high-speed downloads with a recommended interface. TARGET V DD MMC2107 – Rev. 2.0 Technical Data MOTOROLA JTAG Test Access Port and OnCE 583 For More Information On This Product, Go to: www.freescale.com
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MMC2107 - Freescale Semiconductor

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