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参数资料
| 型号： | M38039MC-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 16.8 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-64 |
| 文件页数： | 88/136页 |
| 文件大小： | 2007K |
| 代理商： | M38039MC-XXXFP |
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55
3803/3804 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
3. SRDY1 output of reception side
q Note
When signals are output from the SRDY1 pin on the reception side
by using an external clock in the clock synchronous serial I/O
mode, set all of the receive enable bit, the SRDY1 output enable
bit, and the transmit enable bit to “1” (transmit enabled).
4. Setting serial I/O1 control register again
q Note
Set the serial I/O1 control register again after the transmission and
the reception circuits are reset by clearing both the transmit en-
able bit and the receive enable bit to “0.”
5. Data transmission control with referring to transmit shift
register completion flag
q Note
After the transmit data is written to the transmit buffer register, the
transmit shift register completion flag changes from “1” to “0” with
a delay of 0.5 to 1.5 shift clocks. When data transmission is con-
trolled with referring to the flag after writing the data to the transmit
buffer register, note the delay.
6. Transmission control when external clock is selected
q Note
When an external clock is used as the synchronous clock for data
transmission, set the transmit enable bit to “1” at “H” of the SCLK1
input level. Also, write data to the transmit buffer register at “H” of
the SCLK1 input level.
7. Transmit interrupt request when transmit enable bit is set
q Note
When using the transmit interrupt, 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 instruction has executed.
Set the serial I/O1 transmit interrupt enable bit to “1” (enabled).
q Reason
When the transmit enable bit is set to “1”, the transmit buffer
empty flag and the transmit shift register shift completion flag are
also set to “1”. Therefore, regardless of selecting which timing for
the generating of transmit interrupts, the interrupt request is gener-
ated and the transmit interrupt request bit is set at this point.
Clear both the transmit enable bit
(TE) and the receive enable bit
(RE) to “0”
↓
Set the bits 0 to 3 and bit 6 of the
serial I/O control register
↓
Set both the transmit enable bit
(TE) and the receive enable bit
(RE), or one of them to “1”
Can be set with the
LDM instruction at the
same time
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