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| 型號(hào)： | CR16HCT9 |
| 文件頁(yè)數(shù)： | 123/157頁(yè) |
| 文件大?。?/td> | 1256K |
| 代理商： | CR16HCT9 |
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23.0
Memory Map
The CompactRISC architecture supports a uniform linear ad-
dress space of 2 megabytes. The device implementation of
this architecture uses only the lowest 128K bytes of address
space, ranging from 0000 to 1FFFF hex. Table 42 is a mem-
ory map showing the types of memory and peripherals that
occupy this memory space. Address ranges not listed in the
table are reserved and should not be read or written.
Table 42
Device Memory Map
Table 43 is a detailed memory map showing the specific
memory address of the memory, I/O ports, and registers. The
table shows the starting address, the size, and a brief de-
scription of each memory block and register. For detailed in-
formation on using these memory locations, see the
applicable sections in the data sheet.
All addresses not listed in the table are reserved and should
not be read or written. An attempt to access an unlisted ad-
dress will have unpredictable results.
Each byte-wide register occupies a single address and can
be accessed only in a byte-wide transaction. Each word-wide
register occupies two consecutive memory addresses and
can be accessed only in a word-wide transaction. Both the
byte-wide and word-wide registers reside at word boundaries
(even addresses). Thus, each byte-wide register uses only
the lowest eight bits of the internal data bus.
Most device registers are read/write registers. However,
some registers are read-only or write-only, as indicated in the
table. An attempt to read a write-only register or to write a
read-only register will have unpredictable results.
When the software writes to a register in which one or more
bits are reserved, it must write a zero to each reserved bit un-
less indicated otherwise in the description of the register.
Reading a reserved bit returns an undefined value.
Address
Range (hex)
Description
0000-7FFF
8000-BFFF
C000-CBFF
E000-E5FF
E800-EFFF
Flash Program Memory
a
Flash Program Memory (48K bytes)
Static RAM (3K bytes)
ISP Memory(1.5K bytes)
Lower Endurance Flash EEPROM Data
Memory (2K bytes)
High Endurance Flash EEPROM Data
Memory (128 bytes)
CAN buffers and registers (1K bytes)
BIU Peripherals (768 bytes)
Port B registers
I/O Expansion + Ports PB & PC (256 bytes)
Port C registers
Peripherals and other I/O Ports (1K bytes)
Clock, Power Management, and Wake-Up
registers
Port G registers
Port H registers
Port L registers
Port F registers
Interrupt Control Unit registers
USART 1 registers
MICROWIRE registers
USART 2 registers
ACCESS.bus registers
Port I registers
Timer and WATCHDOG registers
Multi-function Timer1 registers
Multi-function Timer2 registers
Versatile Timer Unit registers
A/D Converter registers
Analog Comparator register
Flash Program Memory (16K bytes)
b
a
. 32K ROM or Flash, size depends on device specifications.
F000-F07F
F400-F7FF
F800-FAFF
FB00-FB06
FB00-FBFF
FB10-FB16
FC00-FFFF
FC40-FC8A
FCA0-FCA8
FCC0-FCC8
FF00-FF08
FD20-FD28
FE00-FE1E
FE40-FE4E
FE60-FE66
FE80-FE8E
FEC0-FECA
FEE0-FEE8
FF20-FF2A
FF40-FF50
FF60-FF70
FF80-FFA4
FFC0-FFD0
FFE0-FFE0
1C000-1FFFF
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