參數(shù)資料
型號(hào)： P80C31X2BN
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage 2.7 to 5.5 V, low power, high speed 30/33 MHz
中文描述： 8-BIT, 33 MHz, MICROCONTROLLER, PDIP40
封裝： 0.600 INCH, PLASTIC, MO-015, SOT-129-1, DIP-40
文件頁數(shù)： 19/38頁
文件大?。?/td> 350K
代理商： P80C31X2BN
Philips Semiconductors
Product specification
80C51/87C51/80C31
80C51 8-bit microcontroller family
4K/128 OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33 MHz)
2000 Jan 20
19
Reduced EMI Mode
The AO bit (AUXR.0) in the AUXR register when set disables the
ALE output.
Reduced EMI Mode
AUXR (8EH)
7
6
5
4
3
2
1
0
–
–
–
–
–
–
–
AO
AUXR.0
AO
Turns off ALE output.
Dual DPTR
The dual DPTR structure (see Figure 13) enables a way to specify
the address of an external data memory location. There are two
16-bit DPTR registers that address the external memory, and a
single bit called DPS = AUXR1/bit0 that allows the program code to
switch between them.
New Register Name: AUXR1#
SFR Address: A2H
Reset Value: xxx000x0B
AUXR1 (A2H)
7
6
5
4
3
2
1
0
–
–
–
LPEP
WUPD
0
–
DPS
Where:
DPS = AUXR1/bit0 = Switches between DPTR0 and DPTR1.
Select Reg
DPS
DPTR0
DPTR1
0
1
The DPS bit status should be saved by software when switching
between DPTR0 and DPTR1.
Note that bit 2 is not writable and is always read as a zero. This
allows the DPS bit to be quickly toggled simply by executing an INC
DPTR insstruction without affecting the WOPD or LPEP bits.
DPS
DPTR1
DPTR0
DPH
(83H)
DPL
(82H)
EXTERNAL
DATA
MEMORY
SU00745A
BIT0
AUXR1
Figure 13.
DPTR Instructions
The instructions that refer to DPTR refer to the data pointer that is
currently selected using the AUXR1/bit 0 register. The six
instructions that use the DPTR are as follows:
INC DPTR
Increments the data pointer by 1
MOV DPTR, #data16
Loads the DPTR with a 16-bit constant
MOV A, @ A+DPTR
Move code byte relative to DPTR to ACC
MOVX A, @ DPTR
Move external RAM (16-bit address) to
ACC
MOVX @ DPTR , A
Move ACC to external RAM (16-bit
address)
JMP @ A + DPTR
Jump indirect relative to DPTR
The data pointer can be accessed on a byte-by-byte basis by
specifying the low or high byte in an instruction which accesses the
SFRs. See application note AN458 for more details.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P80C31X2BN,112 功能描述:8位微控制器 -MCU 80C51 128B 12/6 CLKS 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
P80C32 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:CMOS 0 to 44 MHz Single Chip 8?bit Microntroller
P80C321 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:CMOS SINGLE CHIP MICROCONTROLLER
P80C32-1 制造商:Intel 功能描述:MicroController, 8-Bit, 40 Pin, Plastic, DIP
P80C321-1 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:CMOS SINGLE CHIP MICROCONTROLLER
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