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參數(shù)資料
| 型號(hào)： | AT87251G2D-3CSUM |
| 廠商： | Atmel |
| 文件頁數(shù)： | 77/77頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 8051 MCU 32K OTP 24MHZ 40DIP |
| 標(biāo)準(zhǔn)包裝： | 216 |
| 系列： | 8x251 |
| 核心處理器： | C251 |
| 芯體尺寸： | 8/16-位 |
| 速度： | 24MHz |
| 連通性： | EBI/EMI，I²C，Microwire，SPI，UART/USART |
| 外圍設(shè)備： | POR，PWM，WDT |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲(chǔ)器容量： | 32KB（32K x 8） |
| 程序存儲(chǔ)器類型： | OTP |
| RAM 容量： | 1K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 4.5 V ~ 5.5 V |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 40-DIP（0.600"，15.24mm） |
| 包裝： | 管件 |
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9
AT/TSC8x251G2D
4135F–8051–11/06
T1:0
I/O
Timer 1:0 External Clock Inputs
When timer 1:0 operates as a counter, a falling edge on the T1:0 pin
increments the count.
–
T2
I/O
Timer 2 Clock Input/Output
For the timer 2 capture mode, T2 is the external clock input. For the Timer 2
clock-out mode, T2 is the clock output.
P1.0
T2EX
I
Timer 2 External Input
In timer 2 capture mode, a falling edge initiates a capture of the timer 2
registers. In auto-reload mode, a falling edge causes the timer 2 register to
be reloaded. In the up-down counter mode, this signal determines the
count direction: 1 = up, 0 = down.
P1.1
TXD
O
Transmit Serial Data
TXD outputs the shift clock in serial I/O mode 0 and transmits data in serial
I/O modes 1, 2 and 3.
P3.1
VDD
PWR
Digital Supply Voltage
Connect this pin to +5V or +3V supply voltage.
–
VPP
I
Programming Supply Voltage
The programming supply voltage is applied to this input for programming
the on-chip EPROM/OTPROM.
–
VSS
GND
Circuit Ground
Connect this pin to ground.
–
VSS1
GND
Secondary Ground 1
This ground is provided to reduce ground bounce and improve power
supply bypassing. Connection of this pin to ground is recommended.
However, when using the TSC80251G2D as a pin-for-pin replacement for a
8xC51 product, VSS1 can be unconnected without loss of compatibility.
Not available on DIP package.
–
VSS2
GND
Secondary Ground 2
This ground is provided to reduce ground bounce and improve power
supply bypassing. Connection of this pin to ground is recommended.
However, when using the TSC80251G2D as a pin-for-pin replacement for a
8xC51 product, VSS2 can be unconnected without loss of compatibility.
Not available on DIP package.
–
WAIT#
I
Real-time Synchronous Wait States Input
The real-time WAIT# input is enabled by setting RTWE bit in WCON
(S:A7h). During bus cycles, the external memory system can signal
‘system ready’ to the microcontroller in real time by controlling the WAIT#
input signal.
P1.6
WCLK
O
Wait Clock Output
The real-time WCLK output is enabled by setting RTWCE bit in WCON
(S:A7h). When enabled, the WCLK output produces a square wave signal
with a period of one half the oscillator frequency.
P1.7
WR#
O
Write
Write signal output to external memory.
P3.6
XTAL1
I
Input to the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to this
pin. If an external oscillator is used, its output is connected to this pin.
XTAL1 is the clock source for internal timing.
–
Table 2.
Product Name Signal Description (Continued)
Signal
Name
Type
Description
Alternate
Function
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| AT87251G2D-RLTUL | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:B/16-BIT MICROCONTROLLER WITH SERIAL COMMUNICATION INTERFACES |
| AT87251G2D-RLTUM | 功能描述:8位微控制器 -MCU 251G2D 8/16bitC OTP 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(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 |
| AT87251G2D-SLSUL | 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(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 |
| AT87251G2D-SLSUM | 功能描述:8位微控制器 -MCU OTP 8/16bit St 5V 24MHz 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 |
| AT875 | 制造商:POSEICO 制造商全稱:POSEICO 功能描述:PHASE CONTROL THYRISTOR |
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