
Clock synchronous serial I/O mode
84
Unde
deeopmen
Mitsubishi microcomputers
M30201 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 03B0
16
). (See Figure 1.78.) The
multiple pins function is valid only when the internal clock is selected for UART0.
Figure 1.78. 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 03B0
16
) 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.
Microcomputer
T
X
D
0
(P5
0
)
CLKS (P5
3
)
CLK
0
(P5
2
)
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.