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參數資料
| 型號： | DS80C320-MCG |
| 英文描述： | High-Speed/Low-Power Micro |
| 中文描述： | High-Speed/Low-Power微 |
| 文件頁數： | 13/42頁 |
| 文件大小： | 1501K |
| 代理商： | DS80C320-MCG |
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DS80C320/DS80C323
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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
MOV
MOV
INC
MOV
MOVE:
; THIS LOOP IS PERFORMED THE NUMBER OF TIMES LOADED INTO R5, IN THIS EXAMPLE 64
MOVX
A, @DPTR
; READ SOURCE DATA BYTE
INC
DPS
; CHANGE DPTR TO DESTINATION
MOVX
@DPTR, A
; WRITE DATA TO DESTINATION
INC
DPTR
; NEXT DESTINATION ADDRESS
INC
DPS
; CHANGE DATA POINTER TO SOURCE
INC
DPTR
; NEXT SOURCE ADDRESS
DJNZ
R5, MOVE
; FINISHED WITH TABLE
PERIPHERAL OVERVIEW
Peripherals in the DS80C320/DS80C323 are accessed using Special Function Registers (SFRs). The
device provides 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 described below, and more details
are available in the High-Speed Microcontroller User’s Guide.
SERIAL PORTS
The DS80C320/DS80C323 provides 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
DPS, #86h
; TELL ASSEMBLER ABOUT DPS
R5, #64
DPTR, #DHDL
DPS
DPTR, #SHSL
; NUMBER OF BYTES TO MOVE
; LOAD DESTINATION ADDRESS
; CHANGE ACTIVE DPTR
; LOAD SOURCE ADDRESS
2
3
2
2
2
2
2
3
2
3
3
相關PDF資料 |
PDF描述 |
|---|---|
| DS80C320-MCL | High-Speed/Low-Power Micro |
| DS80C320-MNG | High-Speed/Low-Power Micro |
| DS80C320-MNL | High-Speed/Low-Power Micro |
| DS80C320-QCG | High-Speed/Low-Power Micro |
| DS80C323 | High-Speed/Low-Power Micro |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DS80C320MCG+ | 制造商:Maxim Integrated Products 功能描述:DS80C320 8bit microcontroller,25MHz |
| DS80C320-MCG+ | 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 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 |
| DS80C320-MCL | 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 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 |
| DS80C320MCL+ | 制造商:DSC 功能描述: |
| DS80C320-MCL+ | 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 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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