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参数资料
型号： ATMEGA103-6AI
厂商： Atmel
文件页数： 111/141页
文件大小： 0K
描述： IC MCU 128K 6MHZ A/D IT 64TQFP
产品培训模块： megaAVR Introduction
标准包装： 90
系列： AVR® ATmega
核心处理器： AVR
芯体尺寸： 8-位
速度： 6MHz
连通性： SPI，UART/USART
外围设备： POR，PWM，WDT
输入/输出数： 32
程序存储器容量： 128KB（64K x 16）
程序存储器类型： 闪存
EEPROM 大小： 4K x 8
RAM 容量： 4K x 8
电压 - 电源 (Vcc/Vdd)： 4 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-TQFP
包装： 托盘
配用： ATSTK501-ND - ADAPTER KIT FOR 64PIN AVR MCU
71
ATmega103(L)
0945I–AVR–02/07
Bit 4 – FE: Framing Error
This bit is set if a Framing Error condition is detected, i.e., when the stop bit of an incom-
ing character is zero.
The FE bit is cleared when the stop bit of received data is one.
Bit 3 – OR: OverRun
This bit is set if an OverRun condition is detected, i.e., when a character already present
in the UDR Register is not read before the next character is transferred from the
Receiver Shift Register. The OR bit is buffered, which means that it will be set once the
valid data still in UDRE is read.
The OR bit is cleared (zero) when data is received and transferred to UDR.
Bits 2..0 – Res: Reserved Bits
These bits are reserved bits in the ATmega103(L) and will always read as zero.
UART Control Register – UCR
Bit 7 – RXCIE: RX Complete Interrupt Enable
When this bit is set (one), a setting of the RXC bit in USR will cause the Receive Com-
plete Interrupt routine to be executed, provided that global interrupts are enabled.
Bit 6 – TXCIE: TX Complete Interrupt Enable
When this bit is set (one), a setting of the TXC bit in USR will cause the Transmit Com-
plete Interrupt routine to be executed, provided that global interrupts are enabled.
Bit 5 – UDRIE: UART Data Register Empty Interrupt Enable
When this bit is set (one), a setting of the UDRE bit in USR will cause the UART Data
Register Empty Interrupt routine to be executed, provided that global interrupts are
enabled.
Bit 4 – RXEN: Receiver Enable
This bit enables the UART Receiver when set (one). When the Receiver is disabled, the
RXC, OR and FE Status Flags cannot become set. If these flags are set, turning off
RXEN does not cause them to be cleared.
Bit 3 – TXEN: Transmitter Enable
This bit enables the UART Transmitter when set (one). When disabling the Transmitter
while transmitting a character, the Transmitter is not disabled before the character in the
Shift Register plus any following character in UDR has been completely transmitted.
Bit 2 – CHR9: 9-bit Characters
When this bit is set (one), transmitted and received characters are nine bits long, plus
start and stop bits. The ninth bit is read and written by using the RXB8 and TXB8 bits in
UCR, respectively. The ninth data bit can be used as an extra stop bit or a parity bit.
Bit
7654
321
0
$0A ($2A)
RXCIE
TXCIE
UDRIE
RXEN
TXEN
CHR9
RXB8
TXB8
UCR
Read/Write
R/W
R
W
Initial Value
0000
001
0
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