参数资料
型号: ATTINY2313A-SUR
厂商: Atmel
文件页数: 15/172页
文件大小: 0K
描述: MCU AVR 2KB FLASH 20MHZ 20SOIC
产品培训模块: tinyAVR Introduction
标准包装: 1,000
系列: AVR® ATtiny
核心处理器: AVR
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 18
程序存储器容量: 2KB(1K x 16)
程序存储器类型: 闪存
EEPROM 大小: 128 x 8
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 20-SOIC(0.295",7.50mm 宽)
包装: 带卷 (TR)
其它名称: ATTINY2313A-SUR-ND
111
8246B–AVR–09/11
ATtiny2313A/4313
12.11 Register Description
12.11.1
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 12-2 shows the COM1x1:0 bit functionality when the
WGM13:0 bits are set to a Normal or a CTC mode (non-PWM).
Table 12-3 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 TOP. See “Fast PWM
Mode” on page 99. for more details.
Bit
7
6
5
4
321
0
COM1A1
COM1A0
COM1B1
COM1B0
WGM11
WGM10
TCCR1A
Read/Write
R/W
R
R/W
Initial Value
0
Table 12-2.
Compare Output Mode, non-PWM
COM1A1/COM1B1
COM1A0/COM1B0
Description
00
Normal port operation, OC1A/OC1B
disconnected.
0
1
Toggle OC1A/OC1B on Compare Match.
10
Clear OC1A/OC1B on Compare Match (Set
output to low level).
11
Set OC1A/OC1B on Compare Match (Set output
to high level).
Table 12-3.
Compare Output Mode, Fast PWM(1)
COM1A1/COM1B1
COM1A0/COM1B0
Description
00
Normal port operation, OC1A/OC1B
disconnected.
01
WGM13=0: Normal port operation, OC1A/OC1B
disconnected.
WGM13=1: Toggle OC1A on Compare Match,
OC1B reserved.
10
Clear OC1A/OC1B on Compare Match, set
OC1A/OC1B at TOP
11
Set OC1A/OC1B on Compare Match, clear
OC1A/OC1B at TOP
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