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MC9S12ZVM Family Reference Manual Rev. 1.3
Freescale Semiconductor
143
Chapter 5
Background Debug Controller (S12ZBDCV2)
5.1
Introduction
The background debug controller (BDC) is a single-wire, background debug system implemented in on-
chip hardware for minimal CPU intervention. The device BKGD pin interfaces directly to the BDC.
The S12ZBDC maintains the standard S12 serial interface protocol but introduces an enhanced handshake
protocol and enhanced BDC command set to support the linear instruction set family of S12Z devices and
offer easier, more flexible internal resource access over the BDC serial interface.
5.1.1
Glossary
Table 5-1. Revision History
Revision
Number
Revision Date
Description of Changes
V2.04
03.Dec.2012
Included BACKGROUND/ Stop mode dependency
V2.05
22.Jan.2013
Improved NORESP description and added STEP1/ Wait mode dependency
V2.06
22.Mar.2013
Improved NORESP description of STEP1/ Wait mode dependency
V2.07
11.Apr.2013
Improved STOP and BACKGROUND interdepency description
V2.08
31.May.2013
Section 5.4.4.4
Section 5.4.7.1
Removed misleading WAIT and BACKGROUND interdepency description
Added subsection dedicated to Long-ACK
V2.09
29.Aug.2013
Noted that READ_DBGTB is only available for devices featuring a trace buffer.
V2.10
21.Oct.2013
Improved description of NORESP dependence on WAIT and BACKROUND
Table 5-2. Glossary Of Terms
Term
Definition
DBG
On chip Debug Module
BDM
Active Background Debug Mode
CPU
S12Z CPU
SSC
Special Single Chip Mode (device operating mode
NSC
Normal Single Chip Mode (device operating mode)
BDCSI
Background Debug Controller Serial Interface. This refers to the single pin BKGD serial interface.
EWAIT
Optional S12 feature which allows external devices to delay external accesses until deassertion of EWAIT
Содержание MC9S12ZVM series
Страница 116: ...Chapter 2 Port Integration Module S12ZVMPIMV1 MC9S12ZVM Family Reference Manual Rev 1 3 116 Freescale Semiconductor ...
Страница 242: ...Chapter 7 ECC Generation Module SRAM_ECCV1 MC9S12ZVM Family Reference Manual Rev 1 3 242 Freescale Semiconductor ...
Страница 384: ...Chapter 10 Supply Voltage Sensor BATSV3 MC9S12ZVM Family Reference Manual Rev 1 3 384 Freescale Semiconductor ...
Страница 484: ...Chapter 13 Programmable Trigger Unit PTUV2 MC9S12ZVM Family Reference Manual Rev 1 3 484 Freescale Semiconductor ...
Страница 662: ...Chapter 17 Gate Drive Unit GDUV4 MC9S12ZVM Family Reference Manual Rev 1 3 662 Freescale Semiconductor ...
Страница 684: ...Chapter 18 LIN Physical Layer S12LINPHYV2 MC9S12ZVM Family Reference Manual Rev 1 3 684 Freescale Semiconductor ...
Страница 740: ...Chapter 19 128 KB Flash Module S12ZFTMRZ128K512V2 MC9S12ZVM Family Reference Manual Rev 1 3 740 Freescale Semiconductor ...
Страница 756: ...Appendix A MCU Electrical Specifications MC9S12ZVM Family Reference Manual Rev 1 3 756 Freescale Semiconductor ...
Страница 772: ...Appendix D LINPHY Electrical Specifications MC9S12ZVM Family Reference Manual Rev 1 3 772 Freescale Semiconductor ...
Страница 776: ...Appendix E GDU Electrical Specifications MC9S12ZVM Family Reference Manual Rev 1 3 776 Freescale Semiconductor ...
Страница 788: ...Appendix I MSCAN Electrical Specifications MC9S12ZVM Family Reference Manual Rev 1 3 788 Freescale Semiconductor ...
Страница 790: ...Appendix J Package Information MC9S12ZVM Family Reference Manual Rev 1 3 790 Freescale Semiconductor ...