参数资料
型号: AT89LP213-20XU
厂商: Atmel
文件页数: 21/98页
文件大小: 0K
描述: MCU 8051 2K FLASH 20MHZ 14-TSSOP
产品培训模块: MCU Product Line Introduction
标准包装: 95
系列: 89LP
核心处理器: 8051
芯体尺寸: 8-位
速度: 20MHz
连通性: SPI
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 12
程序存储器容量: 2KB(2K x 8)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 14-TSSOP(0.173",4.40mm 宽)
包装: 管件
28
3538E–MICRO–11/10
AT89LP213/214
14. Enhanced Timer/Counters
The AT89LP213/214 has two 16-bit Timer/Counter registers: Timer 0 and Timer 1. As a Timer,
the register increase every clock cycle by default. Thus, the register counts clock cycles. Since a
clock cycle consists of one oscillator period, the count rate is equal to the oscillator frequency.
The timer rate can be prescaled by a value between 1 and 16 using the Timer Prescaler (see
Table 9-2 on page 14). Both Timers share the same prescaler.
As a Counter, the register is incremented in response to a l-to-0 transition at its corresponding
input pin, T0 or T1. The external input is sampled every clock cycle. When the samples show a
high in one cycle and a low in the next cycle, the count is incremented. The new count value
appears in the register during the cycle following the one in which the transition was detected.
Since 2 clock cycles are required to recognize a l-to-0 transition, the maximum count rate is 1/2
of the oscillator frequency. There are no restrictions on the duty cycle of the input signal, but it
should be held for at least one full clock cycle to ensure that a given level is sampled at least
once before it changes. In the AT89LP214, the T0 and T1 inputs are not available at the pins.
Table 13-5.
Port Pin Alternate Functions
Port Pin
Configuration Bits
Alternate
Function
Notes
PxM0.y
PxM1.y
P1.0
P1M0.0
P1M1.0
AIN0
input-only
GPI0
P1.1
P1M0.1
P1M1.1
AIN1
input-only
GPI1
P1.2
P1M0.2
P1M1.2
GPI2
P1.3
P1M0.3
P1M1.3
GPI3
RST must be disabled
P1.4
P1M0.4
P1M1.4
SS
Resets to quasi-bidirectional
GPI4
P1.5
P1M0.5
P1M1.5
MOSI
GPI5
P1.6
P1M0.6
P1M1.6
MISO
GPI6
P1.7
P1M0.7
P1M1.7
SCK
GPI7
P3.0
P3M0.0
P3M1.0
RXD
AT89LP214 Only
Set as output on AT89LP213
P3.1
P3M0.1
P3M1.1
TXD
P3.2
P3M0.2
P3M1.2
INT0
Internal RC Oscillator Only
P3.3
P3M0.3
P3M1.3
INT1
Internal RC Oscillator or
External Clock Source Only
CLKOUT
P3.4
P3M0.4
P3M1.4
T0
AT89LP213 Only
Set as output on AT89LP214
P3.5
P3M0.5
P3M1.5
T1
P3.6
not configurable
CMPOUT
Pin is tied to comparator output
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AT89LP214-20PU 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 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
AT89LP214-20SU 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 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
AT89LP214-20XU 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 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
AT89LP216-16XI 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT