AN2616 Freescale Semiconductor / Motorola, AN2616 Datasheet - Page 5

• Manufacturer Part Number: AN2616
• Description: Getting Started with HCS08 and CodeWarrior Using C
• Manufacturer: Freescale Semiconductor / Motorola

Background debug
mode
MOTOROLA
The following block diagram shows the major elements of the MC9S08GB60.
Background debug mode (BDM) is a term used to refer to a mode of operation
of the HCS08 where an in-circuit debugging technique is used. To use BDM,
an interface typically referred to as a “BDM pod” is used to connect an external
debugger, such as Metrowerks HCS08 True-Time Simulator and Real-Time
Debugger, running on a PC, to the device being debugged.
A major advantage of Motorola’s BDM is its single pin operation, which allows
all other pins to be used for the application (unlike, for example, JTAG, which
requires four pins to operate).
The functional components of an HCS08 that provide this debugging capability
are the BDC and DBG sections of the core.
Getting Started with HCS08 and CodeWarrior Using C
V
RESET
V
V
IRQ
V
DDAD
Freescale Semiconductor, Inc.
SSAD
REFH
REFL
V
V
DD
SS
For More Information On This Product,
HCS08 SYSTEM CONTROL
LOW-POWER OSCILLATOR
RESETS AND INTERRUPTS
(GB32 = 32,768 BYTES)
(GB32 = 2048 BYTES)
MODES OF OPERATION
(GB60 = 61,268 BYTES)
(GB60 = 4096 BYTES)
POWER MANAGEMENT
CPU
BDC
IRQ
ANALOG-TO-DIGITAL
RTI
CONVERTER (ATD)
GENERATOR (ICG)
INTERNAL CLOCK
Go to: www.freescale.com
HCS08 CORE
USER FLASH
REGULATOR
USER RAM
VOLTAGE
10-BIT
COP
INT
LVD
SERIAL COMMUNICATIONS
SERIAL COMMUNICATIONS
INTERFACE MODULE (SCI1)
INTERFACE MODULE (SCI2)
INTERRUPT MODULE (KBI)
INTERFACE MODULE (SPI)
3-CHANNEL TIMER/PWM
5-CHANNEL TIMER/PWM
SERIAL PERIPHERAL
8-BIT KEYBOARD
IIC MODULE (IIC)
MODULE (TPM1)
MODULE (TPM2)
MODULE (DBG)
DEBUG
INTERNAL BUS
8
8
8
PTC7
PTC6
PTC5
PTC4
PTC3/SCL
PTC2/SDA
PTC1/RxD2
PTC0/TxD2
PTF7–PTF0
PTA7/KBIP7–
PTA0/KBIP0
PTB7/AD7–
PTB0/AD0
PTD7/TPM2CH4
PTD6/TPM2CH3
PTD5/TPM2CH2
PTD4/TPM2CH1
PTD3/TPM2CH0
PTD2/TPM1CH2
PTD1/TPM1CH1
PTD0/TPM1CH0
PTE7
PTE6
PTE5/SPSCK
PTE4/MOSI
PTE3/MISO
PTE2/SS
PTE1/RxD1
PTE0/TxD1
PTG7
PTG6
PTG5
PTG4
PTG3
PTG2/EXTAL
PTG1/XTAL
PTG0/BKGD/MS
Introduction
AN2616
5