參數(shù)資料
型號: MCR705JP7CDWE
廠商: Freescale Semiconductor
文件頁數(shù): 84/164頁
文件大?。?/td> 0K
描述: MCU 8BIT 224B RAM 28-SOIC
標準包裝: 26
系列: HC05
核心處理器: HC05
芯體尺寸: 8-位
速度: 2.1MHz
連通性: SIO
外圍設備: POR,溫度傳感器,WDT
輸入/輸出數(shù): 22
程序存儲器容量: 6KB(6K x 8)
程序存儲器類型: OTP
RAM 容量: 224 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
數(shù)據(jù)轉換器: A/D 4x12b
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
包裝: 管件
Memory
MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
26
Freescale Semiconductor
2.4 User and Interrupt Vector Mapping
The interrupt vectors are contained in the upper memory addresses above $1FF0 as shown in Figure 2-4.
2.5 Random-Access Memory (RAM)
The 224 addresses from $0020 to $00FF serve as both the user RAM and the stack RAM. The central
processor unit (CPU) uses five RAM bytes to save all CPU register contents before processing an
interrupt. During a subroutine call, the CPU uses two bytes to store the return address. The stack pointer
decrements during pushes and increments during pulls.
NOTE
Be careful when using nested subroutines or multiple interrupt levels. The
CPU may overwrite data in the RAM during a subroutine or during the
interrupt stacking operation.
2.6 Erasable Programmable Read-Only Memory (EPROM)
The EPROM is located in three areas of the memory map:
Addresses $0700–$1EFF contain 6144 bytes of user EPROM.
Addresses $1FF0–$1FF1 contain 2 bytes of EPROM reserved for user vectors and COP and
security register (COPR), and the mask option register. Only bit 7 of $1FF0 is a programmable bit.
Addresses $1FF2–$1FFF contain 14 bytes of interrupt vectors.
Address
Register Name
$1FF0
COP Register and EPROM Security
$1FF1
Mask Option Register
$1FF2
Analog Interrupt Vector (MSB)
$1FF3
Analog Interrupt Vector (LSB)
$1FF4
Serial Interrupt Vector (MSB)
$1FF5
Serial Interrupt Vector ((LSB)
$1FF6
Timer Interrupt Vector (MSB)
$1FF7
Timer Interrupt Vector (LSB)
$1FF8
Core Timer Interrupt Vector (MSB)
$1FF9
Core Timer Interrupt Vector (LSB)
$1FFA
External IRQ Vector (MSB)
$1FFB
External IRQ Vector (LSB)
$1FFC
SWI Vector (MSB)
$1FFD
SWI Vector (LSB)
$1FFE
Reset Vector (MSB)
$1FFF
Reset Vector (LSB)
Figure 2-4. Vector Mapping
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