M30622ECTFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30622ECTFP Datasheet - Page 132
M30622ECTFP
Manufacturer Part Number
M30622ECTFP
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Manufacturer
MITSUBISHI [Mitsubishi Electric Semiconductor]
Datasheet
1.M30622ECTFP.pdf
(184 pages)
- Current page: 132 of 184
- Download datasheet (2Mb)
Clock asynchronous serial I/O (UART) mode
Figure 1.19.16. Typical transmit timings in UART mode
• Example of transmit timing when transfer data is 8 bits long (parity enabled, one stop bit)
Transfer clock
Transmit enable
bit(TE)
Transmit buffer
empty flag(TI)
TxDi
Transmit register
empty flag (TXEPT)
Transmit interrupt
request bit (IR)
• Example of transmit timing when transfer data is 9 bits long (parity disabled, two stop bits)
CTSi
Note 1: In M30623(80-pin package), there is no external pin of CTS
Transfer clock
Transmit enable
bit(TE)
Transmit buffer
empty flag(TI)
TxDi
Transmit register
empty flag (TXEPT)
Transmit interrupt
request bit (IR)
Tentative Specifications REV.A
S
Shown in ( ) are bit symbols.
pecifications in this manual are tentative and subject to change.
The above timing applies to the following settings :
Shown in ( ) are bit symbols.
• Parity is enabled.
• One stop bit.
• CTS function is selected.
• Transmit interrupt cause select bit = “1”.
The above timing applies to the following settings :
• Parity is disabled.
• Two stop bits.
• CTS function is disabled.
• Transmit interrupt cause select bit = “0”.
“H”
“1”
“0”
“1”
“0”
“L”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
Start
Start
ST
ST
bit
Data is set in UARTi transmit buffer register
bit
Cleared to “0” when interrupt request is accepted, or cleared by software
D
D
Data is set in UARTi transmit buffer register.
0
0
D
D
1
1
Tc
D
D
2
2
D
D
3
3
Tc
D
D
4
4
The transfer clock stops momentarily as CTS is “H” when the stop bit is checked.
The transfer clock starts as the transfer starts immediately CTS changes to “L”.
Transferred from UARTi transmit buffer register to UARTi transmit register
D
D
5
5
D
D
6
6
Transferred from UARTi transmit buffer register to UARTi transmit register
D
D
Tc = 16 (n + 1) / fi or 16 (n + 1) / f
Parity
7
7
bit
132
D
P
fi : frequency of BRGi count source (f
f
n : value set to BRGi
8
EXT
Stop
Cleared to “0” when interrupt request is accepted, or cleared by software
Tc = 16 (n + 1) / fi or 16 (n + 1) / f
bit
SP
2
Stop
SP
, so do not use the function using this pin.
bit
: frequency of BRGi count source (external clock)
SP
fi : frequency of BRGi count source (f
f
n : value set to BRGi
EXT
Stop
ST
bit
ST
: frequency of BRGi count source (external clock)
D
D
0
0
D
D
1
1
D
D
2
2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Stopped pulsing because transmit enable bit = “0”
D
D
3
EXT
3
D
D
4
4
D
D
5
EXT
5
1
D
, f
D
6
8
6
, f
D
D
32
7
1
7
Mitsubishi microcomputers
)
, f
P SP
D
8
8
, f
32
SPSP
M16C / 62T Group
)
ST
ST
D
0
D
D
0
1
D
1
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