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参数资料
| 型号： | M38227ECHP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | 12 X 12 MM, 0.50 MM PITCH, PLASTIC, QFP-80 |
| 文件页数： | 29/82页 |
| 文件大小： | 1168K |
| 代理商： | M38227ECHP |
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32
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
3822 Group
MITSUBISHI MICROCOMPUTERS
Fig. 29 Structure of serial I/O control registers
BRG count source selection bit (CSS)
0: f(XIN) (f(XCIN) in low-speed mode)
1: f(XIN)/4 (f(XCIN)/4 in low-speed mode)
Serial I/O synchronization clock selection bit (SCS)
0: BRG output divided by 4 when clock synchronized serial
I/O is selected.
BRG output divided by 16 when UART is selected.
1: External clock input when clock synchronized serial I/O is
selected.
External clock input divided by 16 when UART is selected.
SRDY output enable bit (SRDY)
0: P47 pin operates as ordinary I/O pin
1: P47 pin operates as SRDY output pin
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
Serial I/O mode selection bit (SIOM)
0: Asynchronous serial I/O (UART)
1: Clock synchronous serial I/O
Serial I/O enable bit (SIOE)
0: Serial I/O disabled
(pins P44–P47 operate as ordinary I/O pins)
1: Serial I/O enabled
(pins P44–P47 operate as serial I/O pins)
Serial I/O control register
(SIOCON : address 001A16)
b7
b0
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)
Serial I/O status register
(SIOSTS : address 001916)
b7b0
UART control register
(UARTCON : address 001B16)
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
P45/TXD P-channel output disable bit (POFF)
0: CMOS output (in output mode)
1: N-channel open-drain output (in output mode)
Not used (return “1” when read)
b7b0
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