參數(shù)資料
型號(hào): AT89LP216-20PU
廠商: Atmel
文件頁數(shù): 5/98頁
文件大小: 0K
描述: MCU 8051 2K FLASH 20MHZ 16-PDIP
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 30
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(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 14
程序存儲(chǔ)器容量: 2KB(2K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 128 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: 16-DIP(0.300",7.62mm)
包裝: 管件
13
3621E–MICRO–11/10
AT89LP216
10. 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 AT89LP216 has five sources of
reset: power-on reset, brown-out reset, external reset, watchdog reset, and software reset.
10.1
Power-on Reset
A Power-on Reset (POR) is generated by an on-chip detection circuit. The detection level 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 10-1. 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 9-2.
CLKREG
– Clock Control Register
CLKREG = 8FH
Reset Value = 0000 0000B
Not Bit Addressable
TPS3
TPS2
TPS1
TPS0
CDV1
CDV0
COE
Bit
7
6
543
21
0
Symbol
Function
TPS3
TPS2
TPS1
TPS0
Timer Prescaler. The Timer Prescaler selects the time base for Timer 0, Timer 1 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 cycles (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.
CDV1
CDV0
Clock Out Division. Determines the frequency of the clock output relative to the system clock.
CDIV1
CDIV0
Clock Out Frequency
00f/2
01f/4
10f/8
11f/16
COE
Clock Out Enable. Set COE to output a divided version of the system clock on XTAL2 (P3.3). The internal RC oscillator
or external clock source must be selected in order to use this feature.
相關(guān)PDF資料
PDF描述
VE-B71-IW-F4 CONVERTER MOD DC/DC 12V 100W
V375A36E500BG2 CONVERTER MOD DC/DC 36V 500W
VE-B6X-IW-F4 CONVERTER MOD DC/DC 5.2V 100W
VE-B6V-IW-F2 CONVERTER MOD DC/DC 5.8V 100W
AT89LP213-20PU MCU 8051 2K FLASH 20MHZ 14-PDIP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT89LP216-20SU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K 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(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
AT89LP216-20XU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K 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(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
AT89LP3240-20AU 功能描述:8位微控制器 -MCU Sngl-Cycle 8051 IND 2.4-3.6V 32K 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(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
AT89LP3240-20JU 功能描述:8位微控制器 -MCU Sngl-Cycle 8051 IND 2.4-3.6V 32K 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(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
AT89LP3240-20MU 功能描述:8位微控制器 -MCU Sngl-Cycle 8051 IND 2.4-3.6V 32K 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(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