参数资料
型号: TS87C54X2-VIC
厂商: Atmel
文件页数: 5/62页
文件大小: 0K
描述: IC MCU 8BIT 16K OTP 40MHZ 44PQFP
标准包装: 960
系列: 87C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40/30MHz
连通性: UART/USART
外围设备: POR,WDT
输入/输出数: 32
程序存储器容量: 16KB(16K x 8)
程序存储器类型: OTP
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-QFP
包装: 托盘
13
4431E–8051–04/06
AT/TS8xC54/8X2
7.1
Application
Software can take advantage of the additional data pointers to both increase speed and reduce
code size, for example, block operations (copy, compare, search ...) are well served by using
one data pointer as a ’source’ pointer and the other one as a "destination" pointer.
ASSEMBLY LANGUAGE
; Block move using dual data pointers
; Destroys DPTR0, DPTR1, A and PSW
; note: DPS exits opposite of entry state
; unless an extra INC AUXR1 is added
;
00A2
AUXR1 EQU 0A2H
;
0000 909000
MOV
DPTR,#SOURCE
; address of SOURCE
0003 05A2
INC
AUXR1
; switch data pointers
0005 90A000
MOV
DPTR,#DEST
; address of DEST
0008
LOOP:
0008 05A2
INC
AUXR1
; switch data pointers
000A E0
MOVX A,@DPTR
; get a byte from SOURCE
000B A3
INC
DPTR
; increment SOURCE address
000C 05A2
INC
AUXR1
; switch data pointers
000E F0
MOVX @DPTR,A
; write the byte to DEST
000F A3
INC
DPTR
; increment DEST address
0010 70F6
JNZ
LOOP
; check for 0 terminator
0012 05A2
INC
AUXR1
; (optional) restore DPS
INC is a short (2 bytes) and fast (12 clocks) way to manipulate the DPS bit in the AUXR1 SFR.
However, note that the INC instruction does not directly force the DPS bit to a particular state,
but simply toggles it. In simple routines, such as the block move example, only the fact that DPS
is toggled in the proper sequence matters, not its actual value. In other words, the block move
routine works the same whether DPS is '0' or '1' on entry. Observe that without the last instruc-
tion (INC AUXR1), the routine will exit with DPS in the opposite state.
相关PDF资料
PDF描述
PIC24FJ64GB002-I/SP IC MCU 16BIT 64KB FLASH 28DIP
PIC24FJ128GA306-I/PT MCU 16BIT 128KB FLASH 64TQFP
TS87C54X2-LCE IC MCU 8BIT 16K OTP 30MHZ 44VQFP
TS80C51RA2-LCE IC MCU 8BIT 256BYTE 30MHZ 44VQFP
TS87C51RD2-VCE IC MCU 8BIT 64K OTP 40MHZ 44VQFP
相关代理商/技术参数
参数描述
TS87C54X2-VICB 制造商:未知厂家 制造商全称:未知厂家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|QFP|44PIN|PLASTIC
TS87C54X2-VICD 制造商:未知厂家 制造商全称:未知厂家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|QFP|44PIN|PLASTIC
TS87C54X2-VICR 制造商:未知厂家 制造商全称:未知厂家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|QFP|44PIN|PLASTIC
TS87C54X2-VIE 功能描述:IC MCU 8BIT 16K OTP 40MHZ 44VQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:87C 标准包装:1,500 系列:AVR® ATtiny 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C,LIN,SPI,UART/USART,USI 外围设备:欠压检测/复位,POR,PWM,温度传感器,WDT 输入/输出数:16 程序存储器容量:8KB(4K x 16) 程序存储器类型:闪存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 11x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:20-SOIC(0.295",7.50mm 宽) 包装:带卷 (TR)
TS87C54X2-VIEB 制造商:未知厂家 制造商全称:未知厂家 功能描述:MICROCONTROLLER|8-BIT|8051 CPU|CMOS|QFP|44PIN|PLASTIC