MC68340AG16VE Freescale Semiconductor, MC68340AG16VE Datasheet - Page 205

• Manufacturer Part Number: MC68340AG16VE
• Description: IC MPU 32BIT 16MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68340AG16VE

• Processor Type: M683xx 32-Bit
• Speed: 16MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 144-LQFP
• Controller Family/series: 68K
• Core Size: 32 Bit
• No. Of I/o's: 16
• Cpu Speed: 16MHz
• No. Of Timers: 2
• Embedded Interface Type: UART
• Digital Ic Case Style: LQFP
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

executing at completion of the bus cycle. PCC will contain $00000001 if BDM is entered
via a double bus fault immediately out of reset.
5.6.2.6 RETURNING FROM BDM. BDM is terminated when a resume execution (GO) or
call user code (CALL) command is received. Both GO and CALL flush the instruction
pipeline and prefetch instructions from the location pointed to by the RPC.
The return PC and the memory space referred to by the SR SUPV bit reflect any changes
made during BDM. FREEZE is negated prior to initiating the first prefetch. Upon negation
of FREEZE, the serial subsystem is disabled, and the signals revert to IPIPE and IFETCH
functionality.
5.6.2.7 SERIAL INTERFACE. Communication with the CPU32 during BDM occurs via a
dedicated serial interface, which shares pins with other development features. The BKPT
signal becomes the DSCLK; DSI is received on IFETCH , and DSO is transmitted on
IPIPE .
5-68
• LOAD: NOT READY/ RESPONSE
• PERFORM COMMAND
• STORE RESULTS
• ASSERT FREEZE SIGNAL
• WAIT FOR COMMAND
EXECUTE COMMAND
CPU32 ACTIVITY
ENTER (BDM)
Figure 5-21. BDM Command Execution Flowchart
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"NOT READY"
IF RESULTS =
CONTINUE
NO
YES
DEVELOPMENT SYSTEM ACTIVITY
. .
READ RESULTS/NEW COMMAND
• LOAD COMMAND REGISTER
• ENABLE SHIFT CLOCK
• SHIFT OUT 17 BITS
• DISABLE SHIFT CLOCK
• LOAD COMMAND REGISTER
• ENABLE SHIFT CLOCK
• SHIFT IN/OUT 17 BITS
• DISABLE SHIFT CLOCK
• READ RESULT REGISTER
SEND INITIAL COMMAND
MOTOROLA