MC9S12P96CFT Freescale Semiconductor, MC9S12P96CFT Datasheet - Page 150
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MC9S12P96CFT
Manufacturer Part Number
MC9S12P96CFT
Description
MCU 16BIT 96K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.S9S12P32J0MFT.pdf
(566 pages)
Specifications of MC9S12P96CFT
Core Processor
HCS12
Core Size
16-Bit
Speed
32MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
34
Program Memory Size
96KB (96K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
6K x 8
Voltage - Supply (vcc/vdd)
1.72 V ~ 5.5 V
Data Converters
A/D 10x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-QFN Exposed Pad
Processor Series
S12P
Core
HCS12
3rd Party Development Tools
EWHCS12
Development Tools By Supplier
KIT33812ECUEVME, DEMO9S12PFAME
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Background Debug Module (S12SBDMV1)
The hardware handshake protocol is enabled by the ACK_ENABLE and disabled by the ACK_DISABLE
BDM commands. This provides backwards compatibility with the existing POD devices which are not
able to execute the hardware handshake protocol. It also allows for new POD devices, that support the
hardware handshake protocol, to freely communicate with the target device. If desired, without the need
for waiting for the ACK pulse.
The commands are described as follows:
The default state of the BDM after reset is hardware handshake protocol disabled.
All the read commands will ACK (if enabled) when the data bus cycle has completed and the data is then
ready for reading out by the BKGD serial pin. All the write commands will ACK (if enabled) after the data
has been received by the BDM through the BKGD serial pin and when the data bus cycle is complete. See
Section 5.4.3, “BDM Hardware Commands”
for more information on the BDM commands.
The ACK_ENABLE sends an ACK pulse when the command has been completed. This feature could be
used by the host to evaluate if the target supports the hardware handshake protocol. If an ACK pulse is
issued in response to this command, the host knows that the target supports the hardware handshake
protocol. If the target does not support the hardware handshake protocol the ACK pulse is not issued. In
this case, the ACK_ENABLE command is ignored by the target since it is not recognized as a valid
command.
The BACKGROUND command will issue an ACK pulse when the CPU changes from normal to
background mode. The ACK pulse related to this command could be aborted using the SYNC command.
The GO command will issue an ACK pulse when the CPU exits from background mode. The ACK pulse
related to this command could be aborted using the SYNC command.
The GO_UNTIL command is equivalent to a GO command with exception that the ACK pulse, in this
case, is issued when the CPU enters into background mode. This command is an alternative to the GO
command and should be used when the host wants to trace if a breakpoint match occurs and causes the
CPU to enter active background mode. Note that the ACK is issued whenever the CPU enters BDM, which
could be caused by a breakpoint match or by a BGND instruction being executed. The ACK pulse related
to this command could be aborted using the SYNC command.
The TRACE1 command has the related ACK pulse issued when the CPU enters background active mode
after one instruction of the application program is executed. The ACK pulse related to this command could
be aborted using the SYNC command.
150
•
•
ACK_ENABLE — enables the hardware handshake protocol. The target will issue the ACK pulse
when a CPU command is executed by the CPU. The ACK_ENABLE command itself also has the
ACK pulse as a response.
ACK_DISABLE — disables the ACK pulse protocol. In this case, the host needs to use the worst
case delay time at the appropriate places in the protocol.
This information is being provided so that the MCU integrator will be aware
that such a conflict could occur.
S12P-Family Reference Manual, Rev. 1.13
and
NOTE
Section 5.4.4, “Standard BDM Firmware Commands”
Freescale Semiconductor
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