M30218 Datasheet, PDF (97/179 Pages) Mitsubishi Electric Semiconductor – M30218 Group

Clock synchronous serial I/O mode
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(c) Transfer clock output from multiple pins function
This function allows the setting two transfer clock output pins and choosing one of the two to output a
clock by using the CLK and CLKS select bit (bits 4 and 5 at address 03B016). (See Figure GA-10.)
The multiple pins function is valid only when the internal clock is selected for UART1. Note that when
_______ _______
this function is selected, CTS/RTS function of UART1 cannot be used.
Microcomputer
TXD1 (P74)
CLKS1 (P77)
CLK1 (P76)
IN
CLK
IN
CLK
Note: This applies when the internal clock is selected and transmission is
performed only in clock synchronous serial I/O mode.
Figure GA-10. The transfer clock output from the multiple pins function usage
(d) Continuous receive mode
If the continuous receive mode enable bit (bits 2 and 3 at address 03B016) is set to “1”, the unit is
placed in continuous receive mode. In this mode, when the receive buffer register is read out, the unit
simultaneously goes to a receive enable state without having to set dummy data to the transmit buffer
register back again.
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