參數(shù)資料
型號: AT89LP828-20JU
廠商: Atmel
文件頁數(shù): 59/149頁
文件大小: 0K
描述: MCU 8051 8K FLASH SPI 32PLCC
產品培訓模塊: MCU Product Line Introduction
標準包裝: 32
系列: 89LP
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 30
程序存儲器容量: 8KB(8K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量: 768 x 8
電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-LCC(J 形引線)
包裝: 管件
17
3654A–MICRO–8/09
AT89LP428/828
Figure 5-3.
Two-cycle ALU Operation (Example: ADD A, #data)
5.1
Enhanced Dual Data Pointers
The AT89LP428/828 provides two 16-bit data pointers: DPTR0 formed by the register pair
DPOL and DPOH (82H an 83H), and DPTR1 formed by the register pair DP1L and DP1H (84H
and 85H). The data pointers are used by several instructions to access the program or data
memories. The Data Pointer Configuration Register (DPCF) controls operation of the dual data
pointers (Table 5-4). The DPS bit in DPCF selects which data pointer is currently referenced by
instructions including the DPTR operand. Each data pointer may be accessed at its respective
SFR addresses regardless of the DPS value. The AT89LP428/828 provides two methods for
fast context switching of the data pointers:
Bit 2 of DPCF is hard-wired as a logic 0. The DPS bit may be toggled (to switch data pointers)
simply by incrementing the DPCF register, without altering other bits in the register
unintentionally. This is the preferred method when only a single data pointer will be used at
one time.
EX:
INC
DPCF
; Toggle DPS
In some cases, both data pointers must be used simultaneously. To prevent frequent toggling
of DPS, the AT89LP428/828 supports a prefix notation for selecting the opposite data pointer
per instruction. All DPTR instructions, with the exception of JMP @A+DPTR, when prefixed
with an 0A5H opcode will use the inverse value of DPS (DPS) to select the data pointer.
Some assemblers may support this operation by using the /DPTR operand. For example,
the following code performs a block copy within EDATA:
MOV
DPCF, #00H
; DPS = 0
MOV
DPTR, #SRC
; load source address to dptr0
MOV
/DPTR, #DST
; load destination address to dptr1
MOV
R7, #BLKSIZE
; number of bytes to copy
COPY:
MOVX A, @DPTR
; read source (dptr0)
INC
DPTR
; next src (dptr0+1)
MOVX @/DPTR, A
; write destination (dptr1)
INC
/DPTR
; next dst (dptr1+1)
DJNZ R7, COPY
System Clock
Total Execution Time
Fetch Immediate Operand
T1
T2
T3
ALU Operation Execute
Result Write Back
Fetch Next Instruction
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AT89LP828-20MH 功能描述:8位微控制器 -MCU Single Cycle 8051 8K ISP Flash 2.4V-5.5V 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 安裝風格:SMD/SMT
AT89LP828-20PU 功能描述:8位微控制器 -MCU Single Cycle 8051 8K ISP Flash 2.4V-5.5V 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 安裝風格:SMD/SMT
AT89LP828-AU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash, 2.4-5.5V 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 安裝風格:SMD/SMT
AT89LP828-JU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash, 2.4-5.5V 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 安裝風格:SMD/SMT
AT89LP828-PU 功能描述:8位微控制器 -MCU Single-Cycle 8051 8K ISP Flash, 2.4-5.5V 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 最大時鐘頻率:50 MHz 程序存儲器大小: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 安裝風格:SMD/SMT