MC68331CEH25 Freescale Semiconductor, MC68331CEH25 Datasheet - Page 118

• Manufacturer Part Number: MC68331CEH25
• Description: IC MCU 32BIT 25MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68331CEH25

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SCI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 132-QFP
• Controller Family/series: 68K
• No. Of I/o's: 18
• Cpu Speed: 25MHz
• No. Of Timers: 1
• Embedded Interface Type: QSPI, SCI, UART
• No. Of Pwm Channels: 2
• Digital Ic Case Style: PQFP
• Rohs Compliant: Yes
• Processor Series: M683xx
• Core: CPU32
• Data Bus Width: 32 bit
• Data Ram Size: 80 B
• Interface Type: QSPI, SCI, UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 18
• Number Of Timers: 1
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Eeprom Size: -
• Ram Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

5
5.10.2 Background Debugging Mode
5-18
Breakpoint Instruction — An emulator may insert software breakpoints into the target
Unimplemented Instruction Emulation — During instruction execution, when an at-
Microcomputer systems generally provide a debugger, implemented in software, for
system analysis at the lowest level. The background debugging mode (BDM) on the
CPU32 is unique in that the debugger has been implemented in CPU microcode.
BDM incorporates a full set of debugging options: registers can be viewed or altered,
memory can be read or written to, and test features can be invoked.
A resident debugger simplifies implementation of an in-circuit emulator. In a common
setup (see Figure 5-7), emulator hardware replaces the target system processor. A
complex, expensive pod-and-cable interface provides a communication path between
the target system and the emulator.
By contrast, an integrated debugger supports use of a bus state analyzer (BSA) for in-
circuit emulation. The processor remains in the target system (see Figure 5-8) and the
interface is simplified. The BSA monitors target processor operation and the on-chip
debugger controls the operating environment. Emulation is much “closer” to target
hardware, and many interfacing problems (e.g., limitations on high-frequency opera-
tion, AC and DC parametric mismatches, and restrictions on cable length) are mini-
mized.
causing a change in program flow. In the trace mode, a trace exception is gener-
ated after an instruction is executed, allowing a debugger program to monitor the
execution of a program under test.
code to indicate when a breakpoint has occurred. On the MC68010, MC68020,
MC68030, and CPU32, this function is provided via illegal instructions, $4848–
$484F, to serve as breakpoint instructions.
tempt is made to execute an illegal instruction, an illegal instruction exception oc-
curs. Unimplemented instructions (F-line, A-line,...) utilize separate exception
vectors to permit efficient emulation of unimplemented instructions in software.
TARGET
SYSTEM
Figure 5-7 Common In-Circuit Emulator Diagram
Freescale Semiconductor, Inc.
For More Information On This Product,
CENTRAL PROCESSING UNIT
Go to: www.freescale.com
IN-CIRCUIT
EMULATOR
TARGET
MCU
USER’S MANUAL
1128A
MC68331