M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 358

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

Clock-Synchronous Serial I/O
Figure 2.4.13. Operation timing of reception in clock-synchronous serial I/O mode
Example of wiring
Example of operation
Receive interrupt
request bit (IR)
Receive enable
bit (RE)
Transmit enable
bit (TE)
Transmit buffer
empty flag (Tl)
RTSi
CLKi
RxDi
Receive complete
flag (Rl)
The above timing applies to the following settings:
Shown in ( ) are bit symbols.
f
EXT
• RTS function is selected.
• CLK polarity select bit = “0”.
• External clock is selected.
: frequency of external clock
“H”
“L”
“0”
“0”
“0”
“1”
“1”
“1”
“0”
“0”
Microcomputer
“1”
“1”
Transferred from UARTi transmit buffer register to UARTi transmit register
Transferred from UARTi receive register
to UARTi receive buffer register
(1) Reception enabled
(2) Start reception
R
RTSi
CLKi
D
X
Di
0
Dummy data is set in UARTi transmit buffer register
Cleared to “0” when interrupt request is accepted, or cleared by software
D
1
D
2
D
3
D
4
1 / f
Reception data is taken in
Make sure that the following conditions are met when
the CLKi pin input =“H” before data reception
D
• Transmit enable bit
• Receive enable bit
• Dummy data write to UARTi transmit buffer register
5
EXT
D
6
(3) Reception is complete
D
7
Read out from UARTi receive buffer register
Transmitter side IC
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
D
CLK
T
Port
0
X
D
D
“1”
1
“1”
(4) Read of reception data
D
2
D
3
D
4
Mitsubishi microcomputers
M16C / 62 Group
D
5
343