参数资料
型号: M38004E8SS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP64
封装: 0.750 INCH, 1.78 MM PITCH, WINDOWED, CERAMIC, SDIP-64
文件页数: 163/174页
文件大小: 1752K
代理商: M38004E8SS
2.3 Serial I/O
2-40
APPLICATION
3800 GROUP USER’S MANUAL
The communication is performed according to the timing shown below. In the slave unit, when a
synchronizing clock is not input within a certain time (heading adjustive time), the next clock input is
processed as the beginning (heading) of a block.
When a clock is input again after one block (8 byte) is received, the clock is ignored.
Figure 2.3.26 shows a setting of related registers.
Fig. 2.3.25 Timing chart [Cyclic transmission or reception of block data between microcomputers]
D0
Byte cycle
Block transfer period
Block transfer cycle
D1
D2
D7
D0
Interval between blocks
Processing for heading adjustment
Heading adjustive time
Fig. 2.3.26 Setting of related registers [Cyclic transmission or reception of block data between
microcomputers]
Transmit enabled
SIOCON
Serial I/O control register (Address : 1A6)
Synchronous clock : BRG/4
Transmit interrupt source :
Transmit shift operating completion
Receive enabled
Clock synchronous serial I/O
0
1
11
0
Master unit
1
Serial I/O enabled
BRG count source : f(XIN)
Not use the SRDY output
Not be effected by external clock
Transmit enabled
SIOCON
Serial I/O control register (Address : 1A16)
Not use the serial I/O transmit interrupt
Receive enabled
Clock synchronous serial I/O
1
Slave unit
1
Serial I/O enabled
0
Synchronous clock : External clock
Not use the SRDY output
UARTCON
UART control register (Address : 1B16)
P45/TXD pin : CMOS output
0
Both of units
b7
b0
7
BRG
b7
b0
Baud rate generator (Address : 1C16)
Set “division ratio – 1”
b7
b0
b7
b0
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