Maxim-integrated MAXQ622 Manual de usuario descargar pdf (Pagina 207)

MAXQ612/MAXQ622 User’s Guide

Maxim Integrated 14-13

14.4.4 In-Circuit Debug Buffer Register (ICDB)

This register serves as the parallel holding buffer for the debug shift register of the TAP. Data is read from or written to

ICDB for serial communication between the debug routines and the external host.

14.4.5 In-Circuit Debug Data Register (ICDD)

This register is used by the debug engine to store data/read count so that utility ROM code can view that information.

This register is also used by the debug engine as a data register for content matching when BP5 is used as a register

breakpoint. In this case, only data bits in this register with their corresponding mask bits in the ICDA register set are

compared with the updated destination data to determine if a break should be generated.

14.4.6 In-Circuit Debug Address Register (ICDA)

This register is used by the debug engine to addresses so that utility ROM code can view that information. This regis-

ter is also used by the debug engine as a mask register to mask out don’t care bits in the ICDD register when BP5 is

used as a register breakpoint. When a bit in this register is set to 1, the corresponding bit location in the ICDD register

is compared to the data being written to the destination register to determine if a break should be generated. When

a bit in this register is cleared, the corresponding bit in the ICDD register becomes a don’t care and is not compared

against the data being written. When all bits in this register are cleared, any updated data pattern causes a break when

the BP5 register matches the destination register address of the current instruction.

7 0

In-Circuit Debug Buffer Register (ICDB)

Power-On Reset and Test-Logic-Reset

Read (r), Write (w), or Special (s) access

15 0

In-Circuit Debug Data Register (ICDD)

Power-On Reset or Test-Logic-Reset

Read (r), Write (w), or Special (s) access

15 0

In-Circuit Debug Address Register (ICDA)

Power-On Reset or Test-Logic-Reset

Read (r), Write (w), or Special (s) access

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Maxim-integrated MAXQ622 Manual de usuario Pagina 207