S9S12GA240F0VLH Freescale Semiconductor, S9S12GA240F0VLH Datasheet - Page 272
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S9S12GA240F0VLH
Manufacturer Part Number
S9S12GA240F0VLH
Description
16-bit Microcontrollers - MCU 16BIT 240KB FLASH
Manufacturer
Freescale Semiconductor
Datasheet
1.S9S12G96F0CLL.pdf
(1292 pages)
Specifications of S9S12GA240F0VLH
Rohs
yes
Core
S12
Processor Series
MC9S12G
Data Bus Width
16 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
240 KB
Data Ram Size
4 KB
On-chip Adc
Yes
Operating Supply Voltage
3.13 V to 5.5 V
Operating Temperature Range
- 40 C to + 125 C
Package / Case
LQFP-64
Mounting Style
SMD/SMT
Available stocks
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Price
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Part Number:
S9S12GA240F0VLH
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Freescale Semiconductor
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S12G Memory Map Controller (S12GMMCV1)
The reset value of 0xE ensures that there is linear Flash space available between addresses 0x0000 and
0xFFFF out of reset.
The fixed 16KB page from 0xC000-0xFFFF is the page number 0xF.
5.4
The S12GMMC block performs several basic functions of the S12G sub-system operation: MCU
operation modes, priority control, address mapping, select signal generation and access limitations for the
system. Each aspect is described in the following subsections.
5.4.1
5.4.2
5.4.2.1
The BDM firmware lookup tables and BDM register memory locations share addresses with other
modules; however they are not visible in the memory map during user’s code execution. The BDM
memory resources are enabled only during the READ_BD and WRITE_BD access cycles to distinguish
between accesses to the BDM memory area and accesses to the other modules. (Refer to BDM Block
Guide for further details).
When the MCU enters active BDM mode, the BDM firmware lookup tables and the BDM registers
become visible in the local memory map in the range 0xFF00-0xFFFF (global address 0x3_FF00 -
0x3_FFFF) and the CPU begins execution of firmware commands or the BDM begins execution of
hardware commands. The resources which share memory space with the BDM module will not be visible
in the memory map during active BDM mode.
Please note that after the MCU enters active BDM mode the BDM firmware lookup tables and the BDM
registers will also be visible between addresses 0xBF00 and 0xBFFF if the PPAGE register contains value
of 0x0F.
5.4.2.1.1
Expansion of the CPU Local Address Map
The program page index register in S12GMMC allows accessing up to 256KB of address space in the
global memory map by using the four index bits (PPAGE[3:0]) to page 16x16 KB blocks into the program
page window located from address 0x8000 to address 0xBFFF in the local CPU memory map.
274
•
•
Normal single chip mode
This is the operation mode for running application code. There is no external bus in this mode.
Special single chip mode
This mode is generally used for debugging operation, boot-strapping or security related operations.
The active background debug mode is in control of the CPU code execution and the BDM firmware
is waiting for serial commands sent through the BKGD pin.
Functional Description
MCU Operating Modes
Memory Map Scheme
CPU and BDM Memory Map Scheme
Expansion of the Local Address Map
MC9S12G Family Reference Manual,
Rev.1.23
Freescale Semiconductor
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