參數(shù)資料
型號(hào): AT90S8515-8JC
廠商: Atmel
文件頁(yè)數(shù): 43/112頁(yè)
文件大小: 0K
描述: IC MCU 8K FLSH 8MHZ 44PLCC
標(biāo)準(zhǔn)包裝: 27
系列: AVR® 90S
核心處理器: AVR
芯體尺寸: 8-位
速度: 8MHz
連通性: SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 8KB(4K x 16)
程序存儲(chǔ)器類型: 閃存
EEPROM 大小: 512 x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 6 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
36
AT90S8515
0841G–09/01
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
Com par eA p i n 1) . T h is is an a l te r n ati v e fun c t i on to an I/ O por t and th e
corresponding direction control bit must be set (one) to control the output pin. The con-
trol configuration is shown in Table 8.
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 control configuration is given in Table 8.
Note:
X = A or B
In PWM mode, these bits have a different function. Refer to Table 12 on page 40 for a
detailed description.
Bits 3..2 – Res: Reserved Bits
These bits are reserved bits in the AT90S8515 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 9. This mode
is described on page 40.
Bit
7
6
5
4
3
2
1
0
$2F ($4F)
COM1A1
COM1A0
COM1B1
COM1B0
PWM11
PWM10
TCCR1A
Read/Write
R/W
R
R/W
Initial Value
0
Table 8. Compare 1 Mode Select
COM1X1
COM1X0
Description
0
Timer/Counter1 disconnected from output pin OC1X
0
1
Toggle the OC1X output line.
1
0
Clear the OC1X output line (to zero).
1
Set the OC1X output line (to one).
Table 9. PWM Mode Select
PWM11
PWM10
Description
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
Timer/Counter1 is a 10-bit PWM
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