参数资料
型号: AT89LP428-20AU
厂商: Atmel
文件页数: 120/149页
文件大小: 0K
描述: MCU 8051 4K FLASH SPI 32TQFP
产品培训模块: MCU Product Line Introduction
标准包装: 250
系列: 89LP
核心处理器: 8051
芯体尺寸: 8-位
速度: 20MHz
连通性: SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 30
程序存储器容量: 4KB(4K x 8)
程序存储器类型: 闪存
EEPROM 大小: 512 x 8
RAM 容量: 768 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: 32-TQFP
包装: 托盘
72
3654A–MICRO–8/09
AT89LP428/828
Figure 13-11. Phase Correct Symmetrical (Center-Aligned) PWM
13.4.3
Multi-Phasic PWM
The PWM channels may be configured to provide multi-phasic alternating outputs by the PHS
2-0
bits in T2MOD. The AT89LP428/828 provides 1 out of 2, 1 out of 3, 1 out of 4 and 2 out of 4
phase modes (see Table 13-6). In Multi-phasic mode, the PWM outputs on CCA, CCB, CCC and
CCD are connected to a one-hot shift register that selectively enables and disables the outputs
(see Figure 13-12). Compare points on disabled channels are blocked from toggling the output
as if the compare value was set equal to TOP. The PHSD bit in T2MOD controls the direction of
the shift register. Example waveforms are shown in Figure 13-13 on page 73. In order to use
multi-phasic PWM, the associated channels must be configured for PWM operation. Non-PWM
channels are not affected by multi-phasic operation. However, their locations in the shift register
are maintained such that some periods in the PWM outputs may not have any pulses as shown
The PHS
2-0 bits may only be modified when the timer is not operational (TR2 = 0). Updates to
PHSD are allowed at any time. Note that channels C and D in 1:2 phase mode and channel D in
1:3 phase mode operate normally.
{RCAP2H,RCA2L}
CP/RL2 = 0, T2CM1-0 = 11B, DCEN = 0
Inverted
{CCxH,CCxL}
Non-Inverted
CCx
Duty Cycle Updated
Table 13-6.
Summary of Multi-Phasic Modes
PHS2-0
Mode
Behavior
PHSD = 0
PHSD = 1
000
Off
Normal Operation (all channels active at all times)
001
1:2
010
1:3
011
1:4
100
2:4
ABAB
→→→
BABA
→→→
AB
CABC
→→ →→→
CBACBA
→→→ → →
ABCDABCD
→→ → →→→ →
DCBADCBA
→ →→→ → → →
ABA
B
→→→
CDC
D
→→ →
BAB
A
→→→
DCD
C
→→ →
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AT89LP428-20JU 功能描述:8位微控制器 -MCU SingleCycle 8051 4K ISP Flash 2.4V 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
AT89LP428-20MH 功能描述:8位微控制器 -MCU SingleCycle 8051 4K ISP Flash 2.4V 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
AT89LP428-20PU 功能描述:8位微控制器 -MCU SingleCycle 8051 4K ISP Flash 2.4V 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
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 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
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 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