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| 型號(hào)： | DEMO9RS08KA2 |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 94/136頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | DEMO BOARD FOR 9RS08KA2 |
| 產(chǎn)品培訓(xùn)模塊： | Mechatronics USBSpyder08 Discovery Kit RS08KA2 Low-End Microcontroller Series MC9RS08KA8 Microcontroller |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | RS08 |
| 類型： | MCU |
| 適用于相關(guān)產(chǎn)品： | MC9RS08KA2 |
| 所含物品： | 板，線纜，CD，文檔，樣品 IC |
| 產(chǎn)品目錄頁(yè)面： | 730 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | MC9RS08KA2CSCRTR-ND - IC MCU 8BIT 2K FLASH 8-SOIC PC9RS08KA2PAE-ND - MCU 8BIT 2KB FLASH RS08 8-DIP PC9RS08KA2FPE-ND - MCU 8BIT 2KB FLASH RS08 6-VDFN PC9RS08KA2DWE-ND - MCU 8BIT 2KB FLASH RS08 8-SOIC MC9RS08KA2CPC-ND - IC MCU 8-BIT 2K FLASH 8-PDIP MC9RS08KA2CDB-ND - IC MCU 8-BIT 2K FLASH 6-DFN MC9RS08KA2CSC-ND - IC MCU 8-BIT 2K FLASH 8-SOIC |
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Chapter 8 Central Processor Unit (RS08CPUV1)
MC9RS08KA2 Series Data Sheet, Rev. 4
60
Freescale Semiconductor
Other instructions may be executed between the test and the conditional branch as long as the only
instructions used are those which do not disturb the CCR bits that affect the conditional branch. For
instance, a test is performed in a subroutine or function and the conditional branch is not executed until the
subroutine has returned to the main program. This is a form of parameter passing (that is, information is
returned to the calling program in the condition code bits).
Z — Zero Flag
The Z bit is set to indicate the result of an operation was $00.
Branch if equal (BEQ) and branch if not equal (BNE) are simple branches that branch based solely
on the value in the Z bit. All load, store, move, arithmetic, logical, shift, and rotate instructions
cause the Z bit to be updated.
C — Carry
After an addition operation, the C bit is set if the source operands were both greater than or equal
to $80 or if one of the operands was greater than or equal to $80 and the result was less than $80.
This is equivalent to an unsigned overflow. A subtract or compare performs a subtraction of a
memory operand from the contents of a CPU register so after a subtract operation, the C bit is set
if the unsigned value of the memory operand was greater than the unsigned value of the CPU
register. This is equivalent to an unsigned borrow or underflow.
Branch if carry clear (BCC) and branch if carry set (BCS) are branches that branch based solely on
the value in the C bit. The C bit is also used by the unsigned branches BLO and BHS. Add, subtract,
shift, and rotate instructions cause the C bit to be updated. The branch if bit set (BRSET) and
branch if bit clear (BRCLR) instructions copy the tested bit into the C bit to facilitate efficient
serial-to-parallel conversion algorithms. Set carry (SEC) and clear carry (CLC) allow the carry bit
to be set or cleared directly. This is useful in combination with the shift and rotate instructions and
for routines that pass status information back to a main program, from a subroutine, in the C bit.
The C bit is included in shift and rotate operations so those operations can easily be extended to
multi-byte operands. The shift and rotate operations can be considered 9-bit shifts that include an
8-bit operand or CPU register and the carry bit of the CCR. After a logical shift, C holds the bit that
was shifted out of the 8-bit operand. If a rotate instruction is used next, this C bit is shifted into the
operand for the rotate, and the bit that gets shifted out the other end of the operand replaces the
value in C so it can be used in subsequent rotate instructions.
8.2.5
Indexed Data Register (D[X])
This 8-bit indexed data register allows the user to access the data in the direct page address space indexed
by X. This register resides at the memory mapped location $000E. For details on the D[X] register, please
8.2.6
Index Register (X)
This 8-bit index register allows the user to index or address any location in the direct page address space.
This register resides at the memory mapped location $000F. For details on the X register, please refer to
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VE-J1B-EZ | CONVERTER MOD DC/DC 95V 25W |
| EBC28DREH | CONN EDGECARD 56POS .100 EYELET |
| ECC35DCMN | CONN EDGECARD 70POS .100 WW |
| EBC35DCSN | CONN EDGECARD 70POS DIP .100 SLD |
| MRJ0280DD-A | C/A MRJ21/MRJ21 GBE STRT CMR 28M |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DEMO9RS08KA8 | 功能描述:開發(fā)板和工具包 - S08 / S12 DEMO BOARD FOR KA8 PRODUCT RoHS:否 產(chǎn)品:Development Kits 工具用于評(píng)估:MC9S12G128 核心:S12 接口類型:CAN, LIN, RS-232, USB 工作電源電壓:5 V 制造商:Freescale Semiconductor |
| DEMO9RS08KB12 | 功能描述:開發(fā)板和工具包 - S08 / S12 KB12 DEMO Board RoHS:否 產(chǎn)品:Development Kits 工具用于評(píng)估:MC9S12G128 核心:S12 接口類型:CAN, LIN, RS-232, USB 工作電源電壓:5 V 制造商:Freescale Semiconductor |
| DEMO9RS08KB12 | 制造商:Freescale Semiconductor 功能描述:; LEADED PROCESS COMPATIBLE:YES; PEAK RE |
| DEMO9RS08LA8 | 功能描述:開發(fā)板和工具包 - S08 / S12 DEMO BOARD FOR LA8 RoHS:否 產(chǎn)品:Development Kits 工具用于評(píng)估:MC9S12G128 核心:S12 接口類型:CAN, LIN, RS-232, USB 工作電源電壓:5 V 制造商:Freescale Semiconductor |
| DEMO9RS08LE4 | 功能描述:開發(fā)板和工具包 - S08 / S12 LE4 Family Demo Board RoHS:否 產(chǎn)品:Development Kits 工具用于評(píng)估:MC9S12G128 核心:S12 接口類型:CAN, LIN, RS-232, USB 工作電源電壓:5 V 制造商:Freescale Semiconductor |
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