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參數(shù)資料
| 型號： | AT87C51RD2-SLSUL |
| 廠商： | International Rectifier |
| 英文描述： | High Performance 8-bit Microcontroller |
| 中文描述： | 高性能8位微控制器 |
| 文件頁數(shù)： | 9/85頁 |
| 文件大?。?/td> | 762K |
| 代理商： | AT87C51RD2-SLSUL |
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9
4188E–8051–08/06
AT/TS8xC51Rx2
5.1
Pin Description for 64/68 pin Packages
Port 4 and Port 5 are 8-bit bidirectional I/O ports with internal pull-ups. Pins that have 1s written
to them are pulled high by the internal pull ups and can be used as inputs.
As inputs, pins that are externally pulled low will source current because of the internal pull-ups.
Refer to the previous pin description for other pins.
Table 5-1.
64/68 Pin Packages Configuration
12
14
8
I
INT0 (P3.2):
External interrupt 0
13
15
9
I
INT1 (P3.3):
External interrupt 1
14
16
10
I
T0 (P3.4):
Timer 0 external input
15
17
11
I
T1 (P3.5):
Timer 1 external input
16
18
12
O
WR (P3.6):
External data memory write strobe
17
19
13
O
RD (P3.7):
External data memory read strobe
Reset
9
10
4
I
Reset:
A high on this pin for two machine cycles while the oscillator is running, resets
the device. An internal diffused resistor to V
permits a power-on reset using only an
external capacitor to V
CC.
If the hardware watchdog reaches its time-out, the reset pin
becomes an output during the time the internal reset is activated.
ALE/PROG
30
33
27
O (I)
Address Latch Enable/Program Pulse:
Output pulse for latching the low byte of the
address during an access to external memory. In normal operation, ALE is emitted at a
constant rate of 1/6 (1/3 in X2 mode) the oscillator frequency, and can be used for
external timing or clocking. Note that one ALE pulse is skipped during each access to
external data memory. This pin is also the program pulse input (PROG) during EPROM
programming. ALE can be disabled by setting SFR’s AUXR.0 bit. With this bit set, ALE
will be inactive during internal fetches.
PSEN
29
32
26
O
Program Store ENable:
The read strobe to external program memory. When
executing code from the external program memory, PSEN is activated twice each
machine cycle, except that two PSEN activations are skipped during each access to
external data memory. PSEN is not activated during fetches from internal program
memory.
EA/V
PP
31
35
29
I
External Access Enable/Programming Supply Voltage:
EA must be externally held
low to enable the device to fetch code from external program memory locations 0000H
and 3FFFH (RB) or 7FFFH (RC), or FFFFH (RD). If EA is held high, the device
executes from internal program memory unless the program counter contains an
address greater than 3FFFH (RB) or 7FFFH (RC) EA must be held low for ROMless
devices. This pin also receives the 12.75V programming supply voltage (V
PP
) during
EPROM programming. If security level 1 is programmed, EA will be internally latched
on Reset.
XTAL1
19
21
15
I
Crystal 1:
Input to the inverting oscillator amplifier and input to the internal clock
generator circuits.
XTAL2
18
20
14
O
Crystal 2:
Output from the inverting oscillator amplifier
Mnemonic
Pin Number
Type
Name And Function
DIL
LCC
VQFP 1.4
Pin
PLCC68
SQUARE VQFP64 1.4
VSS
51
9/40
VCC
17
8
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT87C51RD2-SLSUM | 功能描述:8位微控制器 -MCU OTP RD/64K 40MHZ 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(fēng)格:SMD/SMT |
| AT87C51RD2-SLSUV | 功能描述:8位微控制器 -MCU Microcontroller 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(fēng)格:SMD/SMT |
| AT87C51RD2-SMSUL | 功能描述:8位微控制器 -MCU Microcontroller 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(fēng)格:SMD/SMT |
| AT87C51RD2-SMSUM | 功能描述:8位微控制器 -MCU Microcontroller 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(fēng)格:SMD/SMT |
| AT87C52X2 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller 8 Kbytes ROM/OTP, ROMless |
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