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| 型號(hào)： | 7531GROUP |
| 英文描述： | 250MA CMOS LDO, ISUPPLY 1UA & 2% VOUT ACCURACY, -40C to +125C, 3-SOT-89, T/R |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁(yè)數(shù)： | 23/64頁(yè) |
| 文件大小： | 633K |
| 代理商： | 7531GROUP |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7531 Group
MITSUBISHI MICROCOMPUTERS
23
Fig. 26 Structure of serial I/O1-related registers (1)
b7 b0
Serial I/O1 status register
(SIO1STS: address 0019
16
, initial value: 81
16
)
Transmit buffer empty flag (TBE)
0: Buffer full
1: Buffer empty
Receive buffer full flag (RBF)
0: Buffer empty
1: Buffer full
Transmit shift register shift completion flag (TSC)
0: Transmit shift in progress
1: Transmit shift completed
Overrun error flag (OE)
0: No error
1: Overrun error
Parity error flag (PE)
0: No error
1: Parity error
Framing error flag (FE)
0: No error
1: Framing error
Summing error flag (SE)
0: (OE) U (PE) U (FE) = 0
1: (OE) U (PE) U (FE) = 1
Not used (returns “1” when read)
UART control register
(UARTCON: address 001B
16
, initial value: E0
16
)
Character length selection bit (CHAS)
0: 8 bits
1: 7 bits
Parity enable bit (PARE)
0: Parity checking disabled
1: Parity checking enabled
Parity selection bit (PARS)
0: Even parity
1: Odd parity
Stop bit length selection bit (STPS)
0: 1 stop bit
1: 2 stop bits
P1
1
/TxD P-channel output disable bit (POFF)
0: CMOS output (in output mode)
1: N-channel open-drain output (in output mode)
Not used (returns “1” when read)
b7 b0
b7 b0
Serial I/O1 control register
(SIO1CON: address 001A
16
, initial value: 02
16
)
BRG count source selection bit (CSS)
0: f(X
IN
)
1: f(X
IN
)/4
Not used (returns “1” when read)
Continuous transmit valid bit
0: Continuous transmit invalid
1: Continuous transmit valid
Transmit interrupt source selection bit (TIC)
0: Interrupt when transmit buffer has
emptied
1: Interrupt when transmit shift
operation is completed
Transmit enable bit (TE)
0: Transmit disabled
1: Transmit enabled
Receive enable bit (RE)
0: Receive disabled
1: Receive enabled
b7 b6
0
0
1
1
0 : Serial I/O1 disabled
1 : Not available
0 : Serial I/O1 enabled
1 : Serial I/O1 cleared
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