M30622SAFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30622SAFP Datasheet - Page 128
M30622SAFP
Manufacturer Part Number
M30622SAFP
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Manufacturer
MITSUBISHI [Mitsubishi Electric Semiconductor]
Datasheet
1.M30622SAFP.pdf
(274 pages)
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Clock asynchronous serial I/O (UART) mode
128
Figure 1.16.18. Typical transmit timings in UART mode(UART2)
• Example of transmit timing when transfer data is 8 bits long (parity enabled, one stop bit)
Transmit interrupt
request bit (IR)
Transfer clock
Transmit enable
bit(TE)
Transmit buffer
empty flag(TI)
TxD
Transmit register
empty flag (TXEPT)
Note: The transmit is started with overflow timing of BRG after having written in a value at the transmit buffer in the above timing.
2
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
Shown in ( ) are bit symbols.
The above timing applies to the following settings :
• Parity is enabled.
• One stop bit.
• Transmit interrupt cause select bit = “1”.
Start
ST
bit
D
Data is set in UART2 transmit buffer register
0
D
1
Tc
D
2
D
3
D
4
D
5
D
6
D
Parity
7
bit
P
SP
Stop
bit
Transferred from UART2 transmit buffer register to UARTi transmit register
Cleared to “0” when interrupt request is accepted, or cleared by software
Tc = 16 (n + 1) / fi
fi : frequency of BRG2 count source (f
n : value set to BRG2
ST
Note
D
0
D
1
D
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
2
D
3
D
4
D
5
D
6
D
7
P
1
, f
M16C / 62A Group
SP
8
, f
Mitsubishi microcomputers
32
)
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