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參數(shù)資料
| 型號： | M38B79FFFP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁數(shù)： | 39/109頁 |
| 文件大小： | 1559K |
| 代理商： | M38B79FFFP |
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38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
39
[Serial I/O2 Control Register] SIO2CON (001D
16
)
The serial I/O2 control register contains eight control bits for serial
I/O2 functions.
[UART Control Register] UARTCON (0038
16
)
This is a 7 bit register containing four control bits, of which four
bits are valid when UART is selected, and of which three bits are
always valid.
Data format of serial data receive/transfer and the output structure
of the P6
5
/TxD pin and others are set by this register.
[Serial I/O2 Status Register] SIO2STS (001E
16
)
The read-only serial I/O2 status register consists of seven flags
(b0 to b6) which indicate the operating status of the serial I/O2
function and various errors. Three of the flags (b4 to b6) are only
valid in the UART mode. The receive buffer full flag (b1) is cleared
to
“
0
”
when the receive buffer is read.
The error detection is performed at the same time data is trans-
ferred from the receive shift register to the receive buffer register,
and the receive buffer full flag is set. A writing to the serial I/O2
status register clears error flags OE, PE, FE, and SE (b3 to b6, re-
spectively). Writing
“
0
”
to the serial I/O2 enable bit (SIOE : b7 of
the serial I/O2 control register) also clears all the status flags, in-
cluding the error flags.
All bits of the serial I/O2 status register are initialized to
“
0
”
at re-
set, but if the transmit enable bit (b4) of the serial I/O2 control
register has been set to
“
1
”
, the transmit shift register shift comple-
tion flag (b2) and the transmit buffer empty flag (b0) become
“
1
”
.
[Serial I/O2 Transmit Buffer Register/Receive
Buffer Register] TB/RB (001F
16
)
The transmit buffer and the receive buffer are located in the same
address. The transmit buffer is write-only and the receive buffer is
read-only. If a character bit length is 7 bits, the MSB of data stored
in the receive buffer is
“
0
”
.
[Baud Rate Generator] BRG (0037
16
)
The baud rate generator determines the baud rate for serial trans-
fer. With the 8-bit counter having a reload register, the baud rate
generator divides the frequency of the count source by 1/(n+1),
where n is the value written to the baud rate generator.
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