MC9S12XDT256CAA Freescale Semiconductor, MC9S12XDT256CAA Datasheet - Page 633

IC MCU 256K FLASH 80-QFP

MC9S12XDT256CAA

Manufacturer Part Number
MC9S12XDT256CAA
Description
IC MCU 256K FLASH 80-QFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet

Specifications of MC9S12XDT256CAA

Core Processor
HCS12X
Core Size
16-Bit
Speed
80MHz
Connectivity
CAN, EBI/EMI, I²C, IrDA, LIN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
59
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
2.35 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
80-QFP
Processor Series
S12XD
Core
HCS12
Data Bus Width
16 bit
Data Ram Size
16 KB
Interface Type
CAN/I2C/SCI/SPI
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
59
Number Of Timers
12
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWHCS12
Development Tools By Supplier
EVB9S12XDP512E
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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17.4.2.1.1
Expansion of the CPU Local Address Map
The program page index register in MMC allows accessing up to 4 Mbyte of FLASH or ROM in the global
memory map by using the eight page index bits to page 256 16 Kbyte blocks into the program page
window located from address $8000 to address $BFFF in the local CPU memory map.
The page value for the program page window is stored in the PPAGE register. The value of the PPAGE
register can be read or written by normal memory accesses as well as by the CALL and RTC instructions
(see
Control registers, vector space and parts of the on-chip memories are located in unpaged portions of the
64-kilobyte local CPU address space.
The starting address of an interrupt service routine must be located in unpaged memory unless the user is
certain that the PPAGE register will be set to the appropriate value when the service routine is called.
However an interrupt service routine can call other routines that are in paged memory. The upper
16-kilobyte block of the local CPU memory space ($C000–$FFFF) is unpaged. It is recommended that all
reset and interrupt vectors point to locations in this area or to the other upages sections of the local CPU
memory map.
Table 1-19
PPAGE register value and value of the ROMHM bit in the MMCCTL1 register.
The RAM page index register allows accessing up to 1 Mbyte –2 Kbytes of RAM in the global memory
map by using the eight RPAGE index bits to page 4 Kbyte blocks into the RAM page window located in
the local CPU memory space from address $1000 to address $1FFF. The EEPROM page index register
EPAGE allows accessing up to 256 Kbytes of EEPROM in the system by using the eight EPAGE index
bits to page 1 Kbyte blocks into the EEPROM page window located in the local CPU memory space from
address $0800 to address $0BFF.
Freescale Semiconductor
Section 1.5.1, “CALL and RTC
summarizes mapping of the address bus in Flash/External space based on the address, the
Expansion of the Local Address Map
1
The internal or the external bus is accessed based on the size of the memory resources
implemented on-chip. Please refer to
$C000–$FFFF
CPU Address
$4000–$7FFF
$8000–$BFFF
Local
Table 17-18. Global FLASH/ROM Allocated
MC9S12XDP512 Data Sheet, Rev. 2.21
ROMHM
Instructions”).
N/A
N/A
N/A
0
1
Figure 1-23
External
Access
Yes
No
Yes
No
No
1
1
for further details.
Chapter 17 Memory Mapping Control (S12XMMCV2)
$7F_4000 –$7F_7FFF
$7F_C000–$7F_FFFF
$40_0000–$7F_FFFF
$14_4000–$14_7FFF
Global Address
633

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