參數資料
型號： MC9RS08KA2CSCR
廠商： Freescale Semiconductor
文件頁數： 92/136頁
文件大?。?/td> 0K
描述： IC MCU 8BIT 2K FLASH 8-SOIC
產品培訓模塊： Mechatronics
USBSpyder08 Discovery Kit
RS08KA2 Low-End Microcontroller Series
MC9RS08KA8 Microcontroller
標準包裝： 1
系列： RS08
核心處理器： RS08
芯體尺寸： 8-位
速度： 10MHz
外圍設備： LVD，POR，WDT
輸入/輸出數： 4
程序存儲器容量： 2KB（2K x 8）
程序存儲器類型： 閃存
RAM 容量： 63 x 8
電壓 - 電源 (Vcc/Vdd)： 1.8 V ~ 5.5 V
振蕩器型： 內部
工作溫度： -40°C ~ 85°C
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
包裝： 標準包裝
其它名稱： MC9RS08KA2CSCRDKR
Chapter 8 Central Processor Unit (RS08CPUV1)
MC9RS08KA2 Series Data Sheet, Rev. 4
Freescale Semiconductor
59
8.2.2
Program Counter (PC)
The program counter is a 14-bit register that contains the address of the next instruction or operand to be
fetched.
During normal execution, the program counter automatically increments to the next sequential memory
location each time an instruction or operand is fetched. Jump, branch, and return operations load the
program counter with an address other than that of the next sequential location. This is called a
change-of-flow.
During reset, the program counter is loaded with $3FFD and the program will start execution from this
specific location.
8.2.3
Shadow Program Counter (SPC)
The shadow program counter is a 14-bit register. During a subroutine call using either a JSR or a BSR
instruction, the return address will be saved into the SPC. Upon completion of the subroutine, the RTS
instruction will restore the content of the program counter from the shadow program counter.
During reset, the shadow program counter is loaded with $3FFD.
8.2.4
Condition Code Register (CCR)
The 2-bit condition code register contains two status flags. The content of the CCR in the RS08 is not
directly readable. The CCR bits can be tested using conditional branch instructions such as BCC and BEQ.
These two register bits are directly accessible through the BDC interface. The following paragraphs
provide detailed information about the CCR bits and how they are used. Figure 8-3 identifies the CCR bits
and their bit positions.
Figure 8-3. Condition Code Register (CCR)
The status bits (Z and C) are cleared to 0 after reset.
The two status bits indicate the results of arithmetic and other instructions. Conditional branch instructions
will either branch to a new program location or allow the program to continue to the next instruction after
the branch, depending on the values in the CCR status bit. Conditional branch instructions, such as BCC,
BCS, and BNE, cause a branch depending on the state of a single CCR bit.
Often, the conditional branch immediately follows the instruction that caused the CCR bit(s) to be updated,
as in this sequence:
cmp
#5
;compare accumulator A to 5
blo
lower
;branch if A smaller 5
more:
deca
;do this if A not higher than or same as 5
lower:
CARRY
ZERO
CCR
C
Z
CONDITION CODE REGISTER
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參數描述
MC9RS08KA2DB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC9RS08KA2PC 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC9RS08KA2SC 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC9RS08KA4 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:MCU Block Diagram
MC9RS08KA4CPG 功能描述:8位微控制器 -MCU 9RS08KA8 16PDIP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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