參數(shù)資料
型號(hào)： COP8SAA7
廠商： National Semiconductor Corporation
英文描述： 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging
中文描述： 8位的CMOS基于ROM和一次性可編程微控制器經(jīng)銷商檢察官到4K內(nèi)存，上電復(fù)位，以及超小型封裝
文件頁(yè)數(shù)： 41/60頁(yè)
文件大?。?/td> 787K
代理商： COP8SAA7
13.0 Instruction Set
(Continued)
Example: Load Accumulator Immediate
LD A,
#
05
Reg/Data
Memory
Accumulator
Contents
Before
XX Hex
Contents
After
05 Hex
Immediate Short.
This is a special case of an immediate in-
struction. In the “Load B immediate” instruction, the 4-bit im-
mediate value in the instruction is loaded into the lower
nibble of the B register. The upper nibble of the B register is
reset to 0000 binary.
Example: Load B Register Immediate Short
LD B,
#
7
Reg/Data
Memory
B Pointer
Contents
Before
12 Hex
Contents
After
07 Hex
Indirect from Program Memory.
This is a special case of
an indirect instruction that allows access to data tables
stored in program memory. In the “Load Accumulator Indi-
rect” (LAID) instruction, the upper and lower bytes of the Pro-
gram Counter (PCU and PCL) are used temporarily as a
pointer to program memory. For purposes of accessing pro-
gram memory, the contents of the Accumulator and PCL are
exchanged. The data pointed to by the Program Counter is
loaded into theAccumulator, and simultaneously, the original
contents of PCL are restored so that the program can re-
sume normal execution.
Example: Load Accumulator Indirect
LAID
Reg/Data
Memory
PCU
PCL
Accumulator
Memory Location
041F Hex
Contents
Before
04 Hex
35 Hex
1F Hex
25 Hex
Contents
After
04 Hex
36 Hex
25 Hex
25 Hex
13.3.2 Tranfer-of-Control Addressing Modes
Program instructions are usually executed in sequential or-
der. However, Jump instructions can be used to change the
normal execution sequence. Several transfer-of-control ad-
dressing modes are available to specify jump addresses.
A change in program flow requires a non-incremental
change in the Program Counter contents. The Program
Counter consists of two bytes, designated the upper byte
(PCU) and lower byte (PCL). The most significant bit of PCU
is not used, leaving 15 bits to address the program memory.
Different addressing modes are used to specify the new ad-
dress for the Program Counter. The choice of addressing
mode depends primarily on the distance of the jump. Farther
jumps sometimes require more instruction bytes in order to
completely specify the new Program Counter contents.
The available transfer-of-control addressing modes are:
Jump Relative
Jump Absolute
Jump Absolute Long
Jump Indirect
The transfer-of-control addressing modes are described be-
low. Each description includes an example of a Jump in-
struction using a particular addressing mode, and the effect
on the Program Counter bytes of executing that instruction.
Jump Relative.
In this 1-byte instruction, six bits of the in-
struction opcode specify the distance of the jump from the
current program memory location. The distance of the jump
can range from 31 to +32.AJP+1 instruction is not allowed.
The programmer should use a NOP instead.
Example: Jump Relative
JP 0A
Reg
Contents
Before
02 Hex
05 Hex
Contents
After
02 Hex
0F Hex
PCU
PCL
Jump Absolute.
In this 2-byte instruction, 12 bits of the in-
struction opcode specify the new contents of the Program
Counter. The upper three bits of the Program Counter re-
main unchanged, restricting the new Program Counter ad-
dress to the same 4 kbyte address space as the current in-
struction.
(This restriction is relevant only in devices using more than
one 4 kbyte program memory space.)
Example: Jump Absolute
JMP 0125
Reg
Contents
Before
0C Hex
77 Hex
Contents
After
01 Hex
25 Hex
PCU
PCL
Jump Absolute Long.
In this 3-byte instruction, 15 bits of
the instruction opcode specify the new contents of the Pro-
gram Counter.
Example: Jump Absolute Long
JMP 03625
Reg/
Memory
PCU
PCL
Contents
Before
42 Hex
36 Hex
Contents
After
36 Hex
25 Hex
www.national.com
41
相關(guān)PDF資料
PDF描述
COP8SAA716N9 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging
COP8SAA720M8 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging
COP8SAA720M9 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging
COP8SAA720N8 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging
COP8SAA720N9 8-Bit CMOS ROM Based and One-Time Programmable OTP Microcontroller with 1k to 4k Memory, Power On Reset, and Very Small Packaging
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
COP8SAA716M7 功能描述:IC MCU OTP 8BIT 1K POR 16-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:COP8™ 8SA 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:40KB（20K x 16） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤(pán) 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
COP8SAA716M8 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
COP8SAA716M8 NOPB 制造商:National Semiconductor 功能描述:MCU 8-bit COP8 CISC 1KB EPROM 3.3V/5V 16-Pin SOIC W Rail 制造商:National Semiconductor 功能描述:MCU 8-bit COP8 CISC 1KB EPROM 3.3V/5V 16-Pin SOIC Rail
COP8SAA716M8/63SN 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
COP8SAA716M8/NOPB 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
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