參數(shù)資料
型號： AT89LP428-20PU
廠商： Atmel
文件頁數(shù)： 66/149頁
文件大?。?/td> 0K
描述： MCU 8051 4K FLASH SPI 28PDIP
產(chǎn)品培訓(xùn)模塊： MCU Product Line Introduction
標(biāo)準(zhǔn)包裝： 14
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(shè)備： 欠壓檢測/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 30
程序存儲器容量： 4KB（4K x 8）
程序存儲器類型： 閃存
EEPROM 大小： 512 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(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 28-DIP（0.300"，7.62mm）
包裝： 管件
23
3654A–MICRO–8/09
AT89LP428/828
7.
Reset
During reset, all I/O Registers are set to their initial values, the port pins are tristated, and the
program starts execution from the Reset Vector, 0000H. The AT89LP428/828 has five sources
of reset: power-on reset, brown-out reset, external reset, watchdog reset, and software reset.
7.1
Power-on Reset
A Power-on Reset (POR) is generated by an on-chip detection circuit. The detection level V
POR
is nominally 1.4V. The POR is activated whenever V
CC is below the detection level. The POR cir-
cuit can be used to trigger the start-up reset or to detect a supply voltage failure in devices
without a brown-out detector. The POR circuit ensures that the device is reset from power-on. A
power-on sequence is shown in Figure 7-1 on page 24. When V
CC reaches the Power-on Reset
threshold voltage V
POR, an initialization sequence lasting tPOR is started. When the initialization
sequence completes, the start-up timer determines how long the device is kept in POR after V
CC
rise. The POR signal is activated again, without any delay, when V
CC falls below the POR
threshold level. A Power-on Reset (i.e. a cold reset) will set the POF flag in PCON. The internally
generated reset can be extended beyond the power-on period by holding the RST pin low longer
than the time-out.
Table 6-2.
CLKREG
– Clock Control Register
CLKREG = 8FH
Reset Value = 0000 0000B
Not Bit Addressable
TPS3TPS2TPS1TPS0
CDV2
CDV1
CDV0
COE
Bit
7
6
543
21
0
Symbol
Function
TPS [3 - 0]
Timer Prescaler. The Timer Prescaler selects the time base for Timer 0, Timer 1, Timer 2 and the Watchdog Timer.
The prescaler is implemented as a 4-bit binary down counter. When the counter reaches zero it is reloaded with the
value stored in the TPS bits to give a division ratio between 1 and 16. By default the timers will count every clock
cycle (TPS = 0000B). To configure the timers to count at a standard 8051 rate of once every 12 clock cycles, TPS
should be set to 1011B.
CDV [2 - 0]
System Clock Division. Determines the frequency of the system clock relative to the oscillator clock source.
CDIV2
CDIV1
CDIV0
System Clock Frequency
00
0
fOSC/1
00
1
fOSC/2
01
0
f
OSC/4
01
1
fOSC/8
10
0
fOSC/16
10
1
f
OSC/32
11
0
reserved
11
1
reserved
COE
Clock Out Enable. Set COE to output the system clock divided by 2 on XTAL2 (P4.1). The internal RC oscillator or
external clock source must be selected in order to use this feature and P4.1 must be configured as an output.
相關(guān)PDF資料
PDF描述
AT89LP428-20JU MCU 8051 4K FLASH SPI 32PLCC
ATMEGA48V-10MU IC AVR MCU 4K 10MHZ 1.8V 32-QFN
ATMEGA48-20MU IC AVR MCU 4K 20MHZ 5V 32-QFN
ATMEGA48V-10AU IC AVR MCU 4K 10MHZ 1.8V 32TQFP
ATMEGA48-20AU IC AVR MCU 4K 20MHZ 5V 32TQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT89LP51-20AU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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
AT89LP51-20JU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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
AT89LP51-20MU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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
AT89LP51-20PU 功能描述:8位微控制器 -MCU Single Cycle 8051 4K ISP FL 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
AT89LP51ED2-20AAU 功能描述:8位微控制器 -MCU 64KB 20MHz 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(fēng)格:SMD/SMT
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*