參數(shù)資料
型號: 16F628
廠商: Microchip Technology Inc.
英文描述: CAT 5E CROSSOVER PATCH CORD CABLE BLUE 1 FT
中文描述: 基于閃存的8位CMOS微控制器
文件頁數(shù): 80/168頁
文件大小: 3760K
代理商: 16F628
PIC16F627A/628A/648A
DS40044A-page 78
Preliminary
2002 Microchip Technology Inc.
FIGURE 12-7:
ASYNCHRONOUS TRANSMISSION (BACK TO BACK)
TABLE 12-6:
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR
Value on
all other
RESETS
0Ch
PIR1
EEIF
CMIF
RCIF
TXIF
CCP1IF
TMR2IF
TMR1IF
0000 -000
0000 -000
18h
RCSTA
SPEN
RX9
SREN
CREN
ADEN
FERR
OERR
RX9D
0000 000x
0000 000x
19h
TXREG USART Transmit data register
0000 0000
0000 0000
8Ch
PIE1
EEIE
CMIE
RCIE
TXIE
CCP1IE
TMR2IE
TMR1IE
0000 -000
0000 -000
98h
TXSTA
CSRC
TX9
TXEN
SYNC
BRGH
TRMT
TX9D
0000 -010
0000 -010
99h
SPBRG Baud Rate Generator Register
0000 0000
0000 0000
Legend:
x
= unknown,
-
= unimplemented locations read as '0'.
Shaded cells are not used for Asynchronous Transmission.
Transmit Shift Reg.
Write to TXREG
BRG output
(shift clock)
RB2/TX/CK (pin)
TXIF bit
(interrupt reg. flag)
TRMT bit
(Transmit shift
reg. empty flag)
Word 1
Word 2
WORD 1
WORD 2
Transmit Shift Reg.
START Bit
STOP Bit
START Bit
WORD 1
WORD 2
Bit 0
Bit 1
Bit 7/8
Bit 0
Note:
This timing diagram shows two consecutive transmissions.
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