MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 255

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 7
Background Debug Module (S12SBDMV1)
7.1
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:
7.1.1
The BDM includes these distinctive features:
Freescale Semiconductor
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This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
Revision Number
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 BDM ROM at global address 0x3_FF0F in active BDM
(value for devices with HCS12S core is 0xC2)
Clock switch removed from BDM (CLKSW bit removed from BDMSTS register)
Single-wire communication with host development system
Enhanced capability for allowing more flexibility in clock rates
SYNC command to determine communication rate
Introduction
1.03
1.04
1.05
1.06
Features
07.Dec.2010
14.May.2009
30.Nov.2009
02.Mar.2011
Date
MC9S12G Family Reference Manual, Rev.1.01
7.3.2.2/7-261
Table 7-1. Revision History
Sections
Affected
7.2/7-257
Internal Conditional text only
Internal Conditional text only
Standardized format of revision history table header.
Corrected BPAE bit description.
Removed references to fixed VCO frequencies
Summary of Changes
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