參數(shù)資料
型號: 25C256
廠商: Microchip Technology Inc.
英文描述: 256K 5.0V SPI Bus Serial EEPROM(4.5~5.5V,256K位,SPI總線串行EEPROM)
中文描述: 256K 5.0V SPI總線串行EEPROM(4.5?5.5V的,256K位和SPI總線串行EEPROM的)
文件頁數(shù): 78/170頁
文件大小: 4191K
代理商: 25C256
PIC16F62X
DS40300C-page 76
Preliminary
2003 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 -00x
0000 0000
0000 -000
0000 -010
0000 0000
0000 -000
0000 -00x
0000 0000
0000 -000
0000 -010
0000 0000
18h
RCSTA
SPEN
RX9
SREN
CREN
ADEN
FERR
OERR
RX9D
19h
TXREG
USART Transmit Register
8Ch
PIE1
EEIE
CMIE
RCIE
TXIE
CCP1IE
TMR2IE
TMR1IE
98h
TXSTA
CSRC
TX9
TXEN
SYNC
BRGH
TRMT
TX9D
99h
Legend:
x
= unknown,
-
= unimplemented locations read as '0'.
Shaded cells are not used for Asynchronous Transmission.
SPBRG
Baud Rate Generator Register
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
1:
This.
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