參數(shù)資料
型號(hào)： M3826AMFA-XXXFP
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, LQFP-100
文件頁(yè)數(shù)： 26/93頁(yè)
文件大小： 996K
代理商： M3826AMFA-XXXFP
Rev.2.00
May. 24, 2006
page 32 of 90
REJ03B0028-0200
3826 Group (A version)
[Transmit Buffer/Receive Buffer Register (TB/
RB)] 001816
The transmit buffer register and the receive buffer register are lo-
cated at the same address. The transmit buffer register is write-
only and the receive buffer register is read-only. If a character bit
length is 7 bits, the MSB of data stored in the receive buffer regis-
ter is “0”.
[Serial I/O1 Status Register (SIO1STS)]
001916
The read-only serial I/O1 status register consists of seven flags
(bits 0 to 6) which indicate the operating status of the serial I/O1
function and various errors.
Three of the flags (bits 4 to 6) are valid only in UART mode.
The receive buffer full flag (bit 1) is set to “0” when the receive
buffer register is read.
If there is an error, it is detected at the same time that data is
transferred from the receive shift register to the receive buffer reg-
ister, and the receive buffer full flag is set to “1”. A write signal to
the serial I/O1 status register sets all the error flags (OE, PE, FE,
and SE) (bit 3 to bit 6, respectively) to “0”. Writing “0” to the serial
I/O1 enable bit (SIOE) also sets all the status flags to “0”, includ-
ing the error flags.
All bits of the serial I/O1 status register are set to “0” at reset, but
if the transmit enable bit of the serial I/O1 control register has
been set to “1”, the transmit shift register shift completion flag and
the transmit buffer empty flag become “1”.
[Serial I/O1 Control Register (SIO1CON)]
001A16
The serial I/O1 control register contains eight control bits for the
serial I/O1 function.
[UART Control Register (UARTCON)] 001B16
The UART control register consists of the bits which set the data
format of an data transmit and receive, and the bit which sets the
output structure of the P45/TXD pin.
[Baud Rate Generator (BRG)] 001C16
The baud rate generator is the 8-bit counter equipped with a
reload register. Set the division value of the BRG count source to
the baud rate generator.
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.
■Notes on serial I/O
When setting the transmit enable bit to “1”, the serial I/O1 transmit
interrupt request bit is automatically set to “1”. When not requiring
the interrupt occurrence synchronous with the transmission en-
abled, take the following sequence.
Set the serial I/O1 transmit interrupt enable bit to “0” (disabled).
Set the transmit enable bit to “1”.
Set the serial I/O1 transmit interrupt request bit to “0” after 1 or
more instructions have been executed.
Set the serial I/O1 transmit interrupt enable bit to “1” (enabled).
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