129
9151AINDCO07/09
ATA8742
21.11 Register Description
21.11.1 TCCR1A Timer/Counter1 Control Register A
" Bit 7:6 COM1A1:0: Compare Output Mode for Channel A
" Bit 5:4 COM1B1:0: Compare Output Mode for Channel B
The COM1A1:0 and COM1B1:0 control the Output Compare pins (OC1A and OC1B respec-
tively) behavior. If one or both of the COM1A1:0 bits are written to one, the OC1A output
overrides the normal port functionality of the I/O pin it is connected to. If one or both of the
COM1B1:0 bit are written to one, the OC1B output overrides the normal port functionality of the
I/O pin it is connected to. However, note that the Data Direction Register (DDR) bit correspond-
ing to the OC1A or OC1B pin must be set in order to enable the output driver.
When the OC1A or OC1B is connected to the pin, the function of the COM1x1:0 bits is depen-
dent of the WGM13:0 bits setting. Table 21-1 on page 129 shows the COM1x1:0 bit functionality
when the WGM13:0 bits are set to a Normal or a CTC mode (non-PWM).
Table 21-2 on page 129 shows the COM1x1:0 bit functionality when the WGM13:0 bits are set to
the fast PWM mode.
Note:
1. A special case occurs when OCR1A/OCR1B equals TOP and COM1A1/COM1B1 is set. In
this case the compare match is ignored, but the set or clear is done at BOTTOM. Fast PWM
Mode on page 120 for more details.
Bit
7
6
5
4
3
2
1
0
0x2F (0x4F)
COM1A1
COM1A0
COM1B1
COM1B0
WGM11
WGM10
TCCR1A
Read/Write
R/W
R/W
R/W
R/W
R
R
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Table 21-1. Compare Output Mode, non-PWM
COM1A1/COM1B1
COM1A0/COM1B0
Description
0
0
Normal port operation, OC1A/OC1B disconnected.
0
1
Toggle OC1A/OC1B on Compare Match.
1
0
Clear OC1A/OC1B on Compare Match (Set output to
low level).
1
1
Set OC1A/OC1B on Compare Match (Set output to
high level).
Table 21-2. Compare Output Mode, Fast PWM
(1)
COM1A1/COM1B1
COM1A0/COM1B0
Description
0
0
Normal port operation, OC1A/OC1B disconnected.
0
1
WGM13=0: Normal port operation, OC1A/OC1B
disconnected.
WGM13=1: Toggle OC1A on Compare Match, OC1B
reserved.
1
0
Clear OC1A/OC1B on Compare Match, set
OC1A/OC1B at BOTTOM (non-inverting mode)
1
1
Set OC1A/OC1B on Compare Match, clear
OC1A/OC1B at BOTTOM (inverting mode)
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
ATA8743-PXQW
MCU W/TRANSMITTER ASK/FSK 24QFN
ATAVRRZ200
KIT DEMO AT86RF230
AV101-12LF
ATTENUATOR HIP3 0.70-1GHZ 8-SOIC
AV102-12LF
ATTENUATOR HIP3 1.7-2GHZ 8SOIC
AV113-12LF
ATTENUATOR HIP3 2.1-2.3GHZ 8SOIC
AXUV100G
SENSOR ELECTRON DETECTION
B0205F50200AHF
XFRMR BALUN RF 200-500MHZ 1608
B0310J50100AHF
XFRMR BALUN RF 300-1000MHZ 0805
相关代理商/技术参数
ATA8743
制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Microcontroller with UHF ASK/FSK Transmitter
ATA8743C- PXQW
功能描述:8位微控制器 -MCU Embedded uC incl RF Tx for 315 MHz
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
ATA8743C-PXQW
制造商:Atmel Corporation 功能描述:EMBEDDED ?C INCL RF TX FOR 868 MHZ - Trays 制造商:Atmel Corporation 功能描述:EMBEDDED C INCL 868MHZ TX
ATA8743C-PXQW-1
功能描述:EMBEDDED INCL RF TX FOR 868 MHZ 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:在售 频率:868MHz ~ 928MHz 应用:通用 调制或协议:UHF 数据速率（最大值）:32kbps 功率 - 输出:5.5dBm 电流 - 传输:9.8mA 数据接口:SPI 天线连接器:PCB，表面贴装 存储容量:4kB 闪存，256B EEPROM，256B SRAM 特性:- 电压 - 电源:2 V ~ 4 V 工作温度:-40°C ~ 85°C 封装/外壳:24-VQFN 裸露焊盘 标准包装:1
ATA8743-PXQW
功能描述:8位微控制器 -MCU Embedded uC incl RF Tx for 315 MHz
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
ATAB5275
功能描述:射频开发工具 LF Tx Antenna driver board (TPMS) RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V
ATAB5276
功能描述:射频开发工具 1A Antenna Driver Demoboard RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V
ATAB5278
功能描述:射频开发工具 LF Tx Antenna driver board (PEG) RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V