M37221M6_03 Datasheet, PDF (18/62 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M37221M6-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
(1) Serial I/O Common Transmission/Reception Mode
By writing “1” to bit 6 of the serial I/O mode register, signals SIN and
SOUT are switched internally to be able to transmit or receive the
serial data.
Figure 11 shows signals on serial I/O common transmission/recep-
tion mode.
Note: When receiving the serial data after writing “FF16” to the serial
I/O register.
P20/SCLK
P21/SOUT
P22/SIN
SM : Serial I/O mode register
“1”
“0”
SM6
Fig. 11. Signals on serial I/O common transmission/reception mode
Clock
Serial I/O shift register (8)
17