參數(shù)資料
型號(hào)： ATTINY13V-10SUR
廠商： Atmel
文件頁數(shù)： 28/176頁
文件大小： 0K
描述： MCU AVR 1KB FLASH 10MHZ 8SOIC
產(chǎn)品培訓(xùn)模塊： tinyAVR Introduction
標(biāo)準(zhǔn)包裝： 2,000
系列： AVR® ATtiny
核心處理器： AVR
芯體尺寸： 8-位
速度： 10MHz
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 6
程序存儲(chǔ)器容量： 1KB（512 x 16）
程序存儲(chǔ)器類型： 閃存
EEPROM 大小： 64 x 8
RAM 容量： 64 x 8
電壓 - 電源 (Vcc/Vdd)： 1.8 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 4x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 8-SOIC（0.209"，5.30mm 寬）
包裝： 帶卷 (TR)
其它名稱： ATTINY13V-10SUR-ND
ATTINY13V-10SURTR
2010-2011 Microchip Technology Inc.
Preliminary
DS41430C-page 123
PIC16(L)F720/721
FIGURE 16-4:
ASYNCHRONOUS TRANSMISSION (BACK-TO-BACK)
16.1.2
AUSART ASYNCHRONOUS
RECEIVER
The Asynchronous mode is typically used in RS-232
systems. The receiver block diagram is shown in
Figure 16-2. The data is received on the RX/DT pin and
drives the data recovery block. The data recovery block
is actually a high-speed shifter operating at 16 times
the baud rate, whereas the serial Receive Shift
Register (RSR) operates at the bit rate. When all 8 or 9
bits of the character have been shifted in, they are
immediately transferred to a two character First-In
First-Out (FIFO) memory. The FIFO buffering allows
reception of two complete characters and the start of a
third character before software must start servicing the
AUSART receiver. The FIFO and RSR registers are not
directly accessible by software. Access to the received
data is via the RCREG register.
16.1.2.1
Enabling the Receiver
The AUSART receiver is enabled for asynchronous
operation by configuring the following three control bits:
CREN = 1
SYNC = 0
SPEN = 1
All other AUSART control bits are assumed to be in
their default state.
Setting the CREN bit of the RCSTA register enables the
receiver circuitry of the AUSART. Clearing the SYNC bit
of the TXSTA register configures the AUSART for
asynchronous operation. Setting the SPEN bit of the
RCSTA
register
enables
the
AUSART
and
automatically configures the RX/DT I/O pin as an input.
Transmit Shift Reg.
Write to TXREG
BRG Output
(Shift Clock)
TX/CK pin
TRMT bit
(Transmit Shift
Reg. Empty Flag)
Word 1
Word 2
Word 1
Word 2
Start bit
Stop bit
Start bit
Transmit Shift Reg.
Word 1
Word 2
bit 0
bit 1
bit 7/8
bit 0
Note:
This timing diagram shows two consecutive transmissions.
1 TCY
TXIF bit
(Transmit Buffer
Empty Flag)
TABLE 16-1:
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
INTCON
GIE
PEIE
TMR0IE
INTE
RABIE
TMR0IF
INTF
RABIF
PIE1
TMR1GIE
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
PIR1
TMR1GIF
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
RCSTA
SPEN
RX9
SREN
CREN
ADDEN
FERR
OERR
RX9D
SPBRG
BRG7
BRG6
BRG5
BRG4
BRG3
BRG2
BRG1
BRG0
TRISC
TRISC7
TRISC6
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
TXREG
AUSART Transmit Data Register
—
TXSTA
CSRC
TX9
TXEN
SYNC
—
BRGH
TRMT
TX9D
Legend: x = unknown, - = unimplemented read as ‘0’. Shaded cells are not used for asynchronous transmission.
Note:
When the SPEN bit is set, the TX/CK I/O
pin is automatically configured as an
output, regardless of the state of the
corresponding TRIS bit and whether or
not the AUSART transmitter is enabled.
The PORT latch is disconnected from the
output driver so it is not possible to use the
TX/CK pin as a general purpose output.
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