M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 373

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

UART
358
Operation
2.5.2 Operation of Serial I/O (transmission in UART mode)
In transmitting data in UART mode, choose functions from those listed in Table 2.5.4. Operations of the
circled items are described below. Figure 2.5.8 shows the operation timing, and Figures 2.5.9 and 2.5.10
show the set-up procedures.
Table 2.5.4. Choosed functions
Note 1: UART0 only. (UART1 CTS/RTS function cannot be used when this function is selected.)
Note 2: UART0, UART1 only.
Note 3: UART2 only.
(1) Setting the transmit enable bit to “1” and writing transmission data to the UARTi transmit
(2) When input to the CTSi pin goes to “L”, transmission starts (the CTSi pin needs to be con-
(3) Transmission data held in the UARTi transmit buffer register is transmitted to the UARTi
(4) When the stop bit(s) is (are) transmitted, the transmit register empty flag goes to “1”, which
(5) If the transmission condition of the next data is ready when transmission is completed, a start
Transmission
interrupt factor
CTS / RTS
separation function
(Note 1)
Transfer clock
source
(Note 2)
CTS function
buffer register readies the data transmissible status.
trolled on the reception side).
transmit register. At this time, the first bit (the start bit) of the transmission data is transmitted
from the TxDi pin. Then, data is transmitted, bit by bit, in sequence: LSB, ····, MSB, parity bit,
and stop bit(s).
indicates that transmission is completed. At this time, the UARTi transmit interrupt request bit
goes to “1”. The transfer clock stops at “H” level.
bit is generated following to stop bit(s), and the next data is transmitted.
Item
O
O
O
O
________
Internal clock (f
CTS function enabled
CTS function disabled
Transmission buffer empty
Transmission complete
Pin shared by CTS and RTS
CTS and RTS separate
External clock (CLKi pin)
_______________
Set-up
1
/ f
8
/ f
32
)
Sleep mode
(Note 2)
Data logic select
function
(Note 3)
T
polarity reverse bit
(Note 3)
Bus collision
detection function
(Note 3)
X
D, R
X
Item
D I/O
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
O
O
O
O
________
Sleep mode off
No reverse
Reverse
No reverse
Reverse
Not selected
Sleep mode selected
Selected
Mitsubishi microcomputers
M16C / 62 Group
Set-up