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参数资料
| 型号： | M38039GCHWG |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PBGA64 |
| 封装： | 6 X 6 MM, 0.65 PITCH, FLGA-64 |
| 文件页数： | 56/103页 |
| 文件大小： | 1412K |
| 代理商： | M38039GCHWG |
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REJ03B0166-0113 Rev.1.13
Aug 21, 2009
Page 56 of 100
3803 Group (Spec.H QzROM version)
[Transmit Buffer Register 3/Receive Buffer Register 3
(TB3/RB3)] 003016
The transmit buffer register 3 and the receive buffer register 3 are
located at 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”.
[Serial I/O3 Status Register (SIO3STS)] 003116
The read-only serial I/O3 status register consists of seven flags
(bits 0 to 6) which indicate the operating status of the serial I/O3
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 cleared to “0” when the
receive buffer register 3 is read.
If there is an error, it is detected at the same time that data is
transferred from the receive shift register 3 to the receive buffer
register 3, and the receive buffer full flag is set. A write to the
serial I/O3 status register clears all the error flags OE, PE, FE,
and SE (bit 3 to bit 6, respectively). Writing “0” to the serial I/O3
enable bit SIOE (bit 7 of the serial I/O3 control register) also
clears all the status flags, including the error flags.
Bits 0 to 6 of the serial I/O3 status register are initialized to “0” at
reset, but if the transmit enable bit (bit 4) of the serial I/O3
control register has been set to “1”, the transmit shift completion
flag (bit 2) and the transmit buffer empty flag (bit 0) become “1”.
[Serial I/O3 Control Register (SIO3CON)] 003216
The serial I/O3 control register consists of eight control bits for
the serial I/O3 function.
[UART3 Control Register (UART3CON)] 003316
The UART control register consists of four control bits (bits 0 to
3) which are valid when asynchronous serial I/O is selected and
set the data format of an data transfer, and one bit (bit 4) which is
always valid and sets the output structure of the P35/TXD3 pin.
[Baud Rate Generator 3 (BRG3)] 002F16
The baud rate generator determines the baud rate for serial
transfer.
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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