參數(shù)資料
型號: AT89LP428-20MH
廠商: Atmel
文件頁數(shù): 129/149頁
文件大?。?/td> 0K
描述: MCU 8051 4K FLASH SPI 32VQFN
產品培訓模塊: MCU Product Line Introduction
標準包裝: 490
系列: 89LP
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: SPI,UART/USART
外圍設備: 欠壓檢測/復位,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?。?/td> 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: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-VFQFN 裸露焊盤
包裝: 托盤
80
3654A–MICRO–8/09
AT89LP428/828
Programmers can achieve very low baud rates with Timer 1 by configuring the Timer to run as a
16-bit auto-reload timer (high nibble of TMOD = 0001B). In this case, the baud rate is given by
the following formula.
Table 16-2 lists commonly used baud rates and how they can be obtained from Timer 1.
16.2.2
Using Timer 2 to Generate Baud Rates
Timer 2 is selected as the baud rate generator by setting TCLK and/or RCLK in T2CON. Under
these conditions, the baud rates for transmit and receive can be simultaneously different by
using Timer 1 for transmit and Timer 2 for receive, or vice versa. The baud rate generator mode
is similar to the auto-reload mode, in that a rollover causes the Timer 2 registers to be reloaded
with the 16-bit value in registers RCAP2H and RCAP2L, which are preset by software. In this
case, the baud rates in Modes 1 and 3 are determined by Timer 2’s overflow rate according to
the following equation:.
Table 16-3 lists commonly used baud rates and how they can be obtained from Timer 2.
Table 16-2.
Commonly Used Baud Rates Generated by Timer 1 (TPS = 0000B)
Baud Rate
f
OSC (MHz)
SMOD1
Timer 1
C/T
Mode
Reload Value
Mode 0: 1 MHz
4
0
X
Mode 2: 750K
12
1
X
62.5K
12
1
0
2
F4H
38.4K
11.059
0
2
F7H
19.2K
11.059
1
0
2
DCH
9.6K
11.059
0
2
DCH
4.8K
11.059
0
2
B8H
2.4K
11.059
0
2
70H
1.2K
11.059
0
1
FEE0H
137.5
11.986
0
1
F55CH
110
6
0
1
F958H
110
12
0
1
F304H
Modes 1, 3
Baud Rate
2
SMOD1
32
--------------------
Oscillator Frequency
65536
RH1,RL1
()
[]
--------------------------------------------------------
×
1
TPS
1
+
---------------------
×
=
Modes 1 and 3
Baud Rate
1
16
------
Oscillator Frequency
65536
RCAP2H,RCAP2L
()
[]
---------------------------------------------------------------------------------
1
TPS
1
+
---------------------
×
=
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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 安裝風格:SMD/SMT
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