M30622 Mitsubishi, M30622 Datasheet - Page 133

• Manufacturer Part Number: M30622
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

Clock asynchronous serial I/O (UART) mode
Figure 1.19.17. Typical receive timing in UART mode
Figure 1.19.18. 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)
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”.
Tentative Specifications REV.A
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
S
pecifications in this manual are tentative and subject to change.
16
BRGi count
source
Receive enable bit
RxDi
Transfer clock
Receive
complete flag
RTSi
Receive interrupt
request bit
Note 1: In M30623(80-pin package), there is no external pin of RTS
, 03A8
The above timing applies to the following settings :
•Parity is disabled.
•One stop bit.
•RTS function is selected.
_______ _______
_______ _______
16
) is set to “1” during reception. In this mode, the unit performs receive operation when
Microcomputer
“1”
“0”
“1”
“0”
“H”
“L”
“1”
“0”
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
Reception triggered when transfer clock
is generated by falling edge of start bit
RTS0 (P6
CTS0 (P6
R
T
X
X
_______ _______
D
D
0
0
(P6
(P6
_______ _______
Start bit
3
2
0
4
)
)
)
)
16
_______ _______
). This function is effective in UART0 only. With this function cho-
Sampled “L”
133
Cleared to “0” when interrupt request is accepted, or cleared by software
D
0
2
Receive data taken in
Transferred from UARTi receive register to
UARTi receive buffer register
, so do not use the function using this pin.
_______
OUT
CTS
RTS
16
IN
) to "1" inputs/outputs the CTS signal and
D
IC
_______
1
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
D
7
_______ _______
Stop bit
Mitsubishi microcomputers
16
).
M16C / 62T Group
_______ _______
_______