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| 型号： | DS80C320-QNG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/38页 |
| 文件大小： | 0K |
| 描述： | IC MCU HI SPEED 33MHZ IND 44PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 26 |
| 系列： | 80C |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 25MHz |
| 连通性： | EBI/EMI，SIO，UART/USART |
| 外围设备： | 电源故障复位，WDT |
| 输入/输出数： | 32 |
| 程序存储器类型： | ROMless |
| RAM 容量： | 256 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 4.5 V ~ 5.5 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 44-LCC（J 形引线） |
| 包装： | 管件 |
| 产品目录页面： | 703 (CN2011-ZH PDF) |
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DS80C320/DS80C323 High-Speed/Low-Power Microcontrollers
14 of 38
64-Byte Block Move with Dual Data Pointer
; SH and SL are high and low byte source address.
; DH and DL are high and low byte of destination address.
; DPS is the data pointer select. Reset condition is DPS=0, DPTR0 is selected.
# CYCLES
EQU
DPS, #86h
; TELL ASSEMBLER ABOUT DPS
MOV
R5, #64
; NUMBER OF BYTES TO MOVE
2
MOV
DPTR, #DHDL
; LOAD DESTINATION ADDRESS
3
INC
DPS
; CHANGE ACTIVE DPTR
2
MOV
DPTR, #SHSL
; LOAD SOURCE ADDRESS
2
MOVE:
; THIS LOOP IS PERFORMED THE NUMBER OF TIMES LOADED INTO R5, IN THIS EXAMPLE 64
MOVX
A, @DPTR
; READ SOURCE DATA BYTE
2
INC
DPS
; CHANGE DPTR TO DESTINATION
2
MOVX
@DPTR, A
; WRITE DATA TO DESTINATION
2
INC
DPTR
; NEXT DESTINATION ADDRESS
3
INC
DPS
; CHANGE DATA POINTER TO SOURCE
2
INC
DPTR
; NEXT SOURCE ADDRESS
3
DJNZ
R5, MOVE
; FINISHED WITH TABLE?
3
PERIPHERAL OVERVIEW
Peripherals in the DS80C320/DS80C323 are accessed using the SFRs. The devices provide several of the
most commonly needed peripheral functions in microcomputer-based systems. These functions are new
to the 80C32 family and include a second serial port, power-fail reset, power-fail interrupt, and a
programmable watchdog timer. These are briefly described in the following paragraphs. More details are
available in the High-Speed Microcontroller User’s Guide.
SERIAL PORTS
The DS80C320/DS80C323 provide a serial port (UART) that is identical to the 80C32. Many
applications require serial communication with multiple devices. Therefore, a second hardware serial port
is provided that is a full duplicate of the standard one. It optionally uses pins P1.2 (RXD1) and P1.3
(TXD1). This port has duplicate control functions included in new SFR locations. The second serial port
operates in a comparable manner with the first. Both can operate simultaneously but can be at different
baud rates.
The second serial port has similar control registers (SCON1 at C0h, SBUF1 at C1h) to the original. One
difference is that for timer-based baud rates, the original serial port can use Timer 1 or Timer 2 to
generate baud rates. This is selected via SFR bits. The new serial port can only use Timer 1.
TIMER-RATE CONTROL
One important difference exists between the DS80C320/DS80C323 and 80C32 regarding timers. The
original 80C32 used a 12 clock-per-cycle scheme for timers and consequently for some serial baud rates
(depending on the mode). The DS80C320/DS80C323 architecture normally runs using 4 clocks per cycle.
However, in the area of timers, it will default to a 12 clock-per-cycle scheme on a reset. This allows
existing code with real-time dependencies such as baud rates to operate properly. If an application needs
higher speed timers or serial baud rates, the timers can be set to run at the 4-clock rate.
The Clock Control register (CKCON - 8Eh) determines these timer speeds. When the relevant CKCON
bit is a logic 1, the device uses 4 clocks per cycle to generate timer speeds. When the control bit is set to a
0, the device uses 12 clocks for timer speeds. The reset condition is a 0. CKCON.5 selects the speed of
Timer 2. CKCON.4 selects Timer 1 and CKCON.3 selects Timer 0. Note that unless a user desires very
fast timing, it is unnecessary to alter these bits. Note that the timer controls are independent.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS80C320-QNG/T&R | 制造商:Maxim Integrated Products 功能描述:MICRO, HI SPD, 44PLCC, 25MHZ,IND,TR - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MCU HI SPEED 33MHZ IND 44PLCC 制造商:Maxim Integrated Products 功能描述:8-bit Microcontrollers - MCU High-Speed Low-Power |
| DS80C320-QNG/T&R | 功能描述:8位微控制器 -MCU High-Speed Low-Power RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| DS80C320QNG/TNR | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
| DS80C320-QNG+ | 功能描述:8位微控制器 -MCU High-Speed Low-Power RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| DS80C320-QNG+T&R | 制造商:Maxim Integrated Products 功能描述:MCU 8BIT CISC ROMLESS 5V 44PLCC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MCU HI SPEED 33MHZ IND 44PLCC 制造商:Maxim Integrated Products 功能描述:8-bit Microcontrollers - MCU High-Speed Low-Power |
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