參數(shù)資料
型號: SAK-C164CH-8FM
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
封裝: 0.65 MM PITCH, METRIC, PLASTIC, QFP-80
文件頁數(shù): 6/74頁
文件大?。?/td> 917K
代理商: SAK-C164CH-8FM
&
Data Sheet
12
1999-08
Memory Organization
The memory space of the C164 is configured in a Von Neumann architecture which
means that code memory, data memory, registers and I/O ports are organized within the
same linear address space which includes 16 MBytes. The entire memory space can be
accessed bytewise or wordwise. Particular portions of the on-chip memory have
additionally been made directly bitaddressable.
The C164 incorporates 64 KBytes of on-chip ROM or Flash memory for code or constant
data. The Flash memory is organized as one 16 KByte sector, two 8 KByte sectors, and
one 32 KByte sector. Each sector can be separately write protected, erased and
programmed (in blocks of 64 Byte).
The lower 32 KBytes of the on-chip ROM or Flash memory can be mapped either to
segment 0 or segment 1.
2 KBytes of on-chip Internal RAM (IRAM) are provided as a storage for user defined
variables, for the system stack, general purpose register banks and even for code. A
register bank can consist of up to 16 wordwide (R0 to R15) and/or bytewide (RL0, RH0,
…, RL7, RH7) so-called General Purpose Registers (GPRs).
1024 bytes (2 * 512 bytes) of the address space are reserved for the Special Function
Register areas (SFR space and ESFR space). SFRs are wordwide registers which are
used for controlling and monitoring functions of the different on-chip units. Unused SFR
addresses are reserved for future members of the C166 Family.
2 KBytes of on-chip Extension RAM (XRAM) are provided to store user data, user
stacks, or code. The XRAM is accessed like external memory and therefore cannot be
used for the system stack or for register banks and is not bitaddressable. The XRAM
permits 16-bit accesses with maximum speed.
4 KBytes of on-chip Data Flash memory, organized as four 1 KByte sectors, provide
EEPROM functionality. Each byte/word can be erased or programmed separately. Each
sector can be erased as a unit. The low granularity (byte/word) and the high endurance
of the DataFlash/EEPROM support the non-volatile storage of changing system data.
Note: The DataFlash/EEPROM is only incorporated in the Flash versions.
In order to meet the needs of designs where more memory is required than is provided
on chip, up to 4 MBytes of external RAM and/or ROM can be connected to the
microcontroller.
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