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參數(shù)資料
| 型號： | AT43USB320A-AC |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Full-speed USB Microcontroller with an Embedded Hub |
| 中文描述： | 8-BIT, 12 MHz, RISC MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 14 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, MS-026AED, LQFP-100 |
| 文件頁數(shù)： | 43/115頁 |
| 文件大?。?/td> | 722K |
| 代理商： | AT43USB320A-AC |
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43
AT43USB320A
1443E–USB–4/04
Timer/Counter1 Control Register A – TCCR1A
Bits 7, 6 – COM1A1, COM1A0: Compare Output Mode1A, Bits 1 and 0
The COM1A1 and COM1A0 control bits determine any output pin action following a compare
match in Timer/Counter1. Any output pin actions affect pin OC1A (Output CompareA) pin 1.
This is an alternative function to an I/O port and the corresponding direction control bit must be
set (one) to control the output pin. The control configuration is shown in Table 13.
Bits 5, 4 –COM1B1, COM1B0: Compare Output Mode1B, Bits 1 and 0
The COM1B1 and COM1B0 control bits determine any output pin action following a compare
match in Timer/Counter1. Any output pin actions affect pin OC1B (Output CompareB). The fol-
lowing control configuration is given:
Notes:
1. X = A or B
2. In PWM mode, these bits have a different function. Refer to Table 17 for a detailed
description.
Bits 3..2 –Res: Reserved Bits
These bits are reserved bits in the AT43USB320A and always read zero.
Bits 1..0 –PWM11, PWM10: Pulse Width Modulator Select Bits 1 and 0
These bits select PWM operation of Timer/Counter1 as specified in Table 14.
Bit
7
6
5
4
3
2
1
0
$2F ($4F)
COM1A1
COM1A0
COM1B1
COM1B0
–
–
PWM11
PWM10
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 13.
Compare 1 Mode Select
(2)
COM1X1
COM1X0
Description
0
0
Timer/Counter1 disconnected from output pin OC1X.
(1)
0
1
Toggle the OC1X output line.
(1)
1
0
Clear the OC1X output line (to zero).
(1)
1
1
Set the OC1X output line (to one).
(1)
Table 14.
PWM Mode Select
PWM11
PWM10
Description
0
0
PWM operation of Timer/Counter1 is disabled.
0
1
Timer/Counter1 is an 8-bit PWM.
1
0
Timer/Counter1 is a 9-bit PWM.
1
1
Timer/Counter1 is a 10-bit PWM.
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相關(guān)代理商/技術(shù)參數(shù) |
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