sc9s12hy64j0vllr Freescale Semiconductor, Inc, sc9s12hy64j0vllr Datasheet - Page 159

• Manufacturer Part Number: sc9s12hy64j0vllr
• Description: S12 Microcontrollers Mcu 16-bit Hcs12 Cisc 32kb Flash 5v Tray
• Manufacturer: Freescale Semiconductor, Inc

Chapter 5
Background Debug Module (S12SBDMV1)
Revision History
5.1
This section describes the functionality of the background debug module (BDM) sub-block of the HCS12S
core platform.
The background debug module (BDM) sub-block is a single-wire, background debug system implemented
in on-chip hardware for minimal CPU intervention. All interfacing with the BDM is done via the BKGD
pin.
The BDM has enhanced capability for maintaining synchronization between the target and host while
allowing more flexibility in clock rates. This includes a sync signal to determine the communication rate
and a handshake signal to indicate when an operation is complete. The system is backwards compatible to
the BDM of the S12 family with the following exceptions:
5.1.1
The BDM includes these distinctive features:
Freescale Semiconductor
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Revision Number
s12s_bdm.01.00.00
s12s_bdm.01.00.02
s12s_bdm.01.00.12
s12s_bdm.01.01.01
TAGGO command not supported by S12SBDM
External instruction tagging feature is part of the DBG module
S12SBDM register map and register content modified
Family ID readable from firmware ROM at global address 0x3_FF0F (value for devices with
HCS12S core is 0xC2)
Clock switch removed from BDM (CLKSW bit removed from BDMSTS register)
Introduction
01.02
Features
10.May.2006
20.Sep.2007
08.Feb.2006
09.Feb.2006
08.Apr.2009
Date
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
First version of S12SBDMV1
Updated register address information & Block Version
Removed CLKSW bit and description
Added conditional text for S12P family
Minor text correctsions following review
Summary of Changes
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