参数资料
型号: ATMEGA649V-8MI
厂商: Atmel
文件页数: 129/146页
文件大小: 0K
描述: IC AVR MCU FLASH 64K 1.8V 64QFN
产品培训模块: megaAVR Introduction
标准包装: 260
系列: AVR® ATmega
核心处理器: AVR
芯体尺寸: 8-位
速度: 8MHz
连通性: SPI,UART/USART,USI
外围设备: 欠压检测/复位,LCD,POR,PWM,WDT
输入/输出数: 53
程序存储器容量: 64KB(32K x 16)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 4K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-VFQFN 裸露焊盘
包装: 托盘
57
2552K–AVR–04/11
ATmega329/3290/649/6490
Bit 4 – PCIF0: Pin Change Interrupt Flag 0
When a logic change on any PCINT7..0 pin triggers an interrupt request, PCIF0 becomes set
(one). If the I-bit in SREG and the PCIE0 bit in EIMSK are set (one), the MCU will jump to the
corresponding Interrupt Vector. The flag is cleared when the interrupt routine is executed. Alter-
natively, the flag can be cleared by writing a logical one to it.
Bit 0 – INTF0: External Interrupt Flag 0
When an edge or logic change on the INT0 pin triggers an interrupt request, INTF0 becomes set
(one). If the I-bit in SREG and the INT0 bit in EIMSK are set (one), the MCU will jump to the cor-
responding Interrupt Vector. The flag is cleared when the interrupt routine is executed.
Alternatively, the flag can be cleared by writing a logical one to it. This flag is always cleared
when INT0 is configured as a level interrupt.
12.2.4
PCMSK3 – Pin Change Mask Register 3(1)
Bit 6:0 – PCINT30..24: Pin Change Enable Mask 30..24
Each PCINT30..24-bit selects whether pin change interrupt is enabled on the corresponding I/O
pin. If PCINT30..24 is set and the PCIE3 bit in EIMSK is set, pin change interrupt is enabled on
the corresponding I/O pin. If PCINT30..24 is cleared, pin change interrupt on the corresponding
I/O pin is disabled.
12.2.5
PCMSK2 – Pin Change Mask Register 2
Bit 7:0 – PCINT23:16: Pin Change Enable Mask 23:16
Each PCINT23:16 bit selects whether pin change interrupt is enabled on the corresponding I/O
pin. If PCINT23:16 is set and the PCIE2 bit in EIMSK is set, pin change interrupt is enabled on
the corresponding I/O pin. If PCINT23:16 is cleared, pin change interrupt on the corresponding
I/O pin is disabled.
Note:
1. PCMSK3 and PCMSK2 are only present in ATmega3290/6490.
Bit
7
654
321
0
PCINT30
PCINT29
PCINT28
PCINT27
PCINT26
PCINT25
PCINT24
PCMSK3
Read/Write
R
R/W
Initial Value
0
Bit
76543
210
PCINT23
PCINT22
PCINT21
PCINT20
PCINT19
PCINT18
PCINT17
PCINT16
PCMSK2
Read/Write
R/W
Initial
Value
00000
000
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