M30622M4 MITSUBISHI [Mitsubishi Electric Semiconductor], M30622M4 Datasheet - Page 134

• Manufacturer Part Number: M30622M4
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Clock asynchronous serial I/O (UART) mode
134
Figure 1.19.18. Typical receive timing in UART mode
Figure 1.19.19. The separate CTS/RTS pins function usage
• Example of receive timing when transfer data is 8 bits long (parity disabled, one stop bit)
(a) Separate CTS/RTS pins function (UART0)
(b) Sleep mode (UART0, UART1)
RxDi
Transfer clock
Receive
complete flag
Receive interrupt
request bit
BRGi count
source
Receive enable bit
RTSi
This mode is used to transfer data between specific microcomputers among multiple microcomputers
connected using UARTi. The sleep mode is selected when the sleep select bit (bit 7 at addresses
03A0
the MSB of the received data = “1” and does not perform receive operation when the MSB = “0”.
Setting the CTS/RTS separate bit (bit 6 of address 03B0
_______
RTS signal from different pins. Choose which to use, CTS or RTS, by use of the CTS/RTS function
select bit (bit 2 of address 03A4
sen, the user cannot use the CTS/RTS function. Set "0" both to the CTS/RTS function select bit (bit
2 of address 03AC
16
, 03A8
_______ _______
_______ _______
16
“1”
“0”
“1”
“0”
“L”
“1”
“0”
“H”
) is set to “1” during reception. In this mode, the unit performs receive operation when
The above timing applies to the following settings :
Reception triggered when transfer clock
is generated by falling edge of start bit
Microcomputer
•Parity is disabled.
•One stop bit.
•RTS function is selected.
Note : The user cannot use CTS and RTS at the same time.
16
) and to the CTS/RTS disable bit (bit 4 of address 03AC
RTS0 (P6
CTS0 (P6
R
T
X
X
_______ _______
D
D
Start bit
0
0
(P6
(P6
_______ _______
3
2
0
4
Sampled “L”
)
)
)
)
16
_______ _______
). This function is effective in UART0 only. With this function cho-
Cleared to “0” when interrupt request is accepted, or cleared by software
D
0
Receive data taken in
Transferred from UARTi receive register to
UARTi receive buffer register
_______
16
IN
OUT
CTS
RTS
D
) to "1" inputs/outputs the CTS signal and
1
IC
_______
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
D
7
_______ _______
Stop bit
16
).
Mitsubishi microcomputers
_______ _______
M16C / 62 Group
_______