參數(shù)資料
型號: MC68HC05PL4P
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.56 MHz, MICROCONTROLLER, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 9/98頁
文件大小: 1019K
代理商: MC68HC05PL4P
April 30, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05PL4
MEMORY
MOTOROLA
REV 2.0
2-1
SECTION 2
MEMORY
This section describes the organization of the memory on the MC68HC05PL4.
2.1
MEMORY MAP
The CPU can address 8k-bytes of memory space as shown in Figure 2-1. The
ROM portion of the memory holds the program instructions, xed data, user
dened vectors, and interrupt service routines. The RAM portion of memory holds
variable data. I/O registers are memory mapped so that the CPU can access their
locations in the same way that it accesses all other memory locations.
Figure 2-1. MC68HC05PL4 Memory Map
I/O REGISTERS
32 BYTES
USER RAM
256 BYTES
UNUSED
USER ROM
4096 BYTES
SELF-CHECK ROM
496 BYTES
$0000
$001F
$0020
$011F
$0120
$0DFF
$0E00
$1DFF
$1E00
$1FEF
$1FFF
$1FF0
$00C0
$00FF
STACK
64 BYTES
USER VECTORS
16 BYTES
RESERVED
KEYBOARD
8-BIT TIMER
16-BIT TIMER
IRQ
SWI
RESET
$1FF0-$1FF1
$1FF2-$1FF3
$1FF4-$1FF5
$1FF6-$1FF7
$1FF8-$1FF9
$1FFA-$1FFB
$1FFC-$1FFD
$1FFE-$1FFF
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