M30622SAFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30622SAFP Datasheet - Page 130

• Manufacturer Part Number: M30622SAFP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Clock asynchronous serial I/O (UART) mode
130
Figure 1.16.21. Detection timing of a bus collision (in UART mode)
(c) TxD, RxD I/O polarity reverse function (UART2)
(d) Bus collision detection function (UART2)
This function is to reverse T
(including the start bit, stop bit(s), and parity bit) is reversed. Set this function to “0” (not to reverse) for
usual use.
This function is to sample the output level of the T
edge of the transfer clock; if their values are different, then an interrupt request occurs. Figure 1.16.21
shows the example of detection timing of a buss collision (in UART mode).
interrupt request signal
Bus collision detection
Bus collision detection
interrupt request bit
Transfer clock
RxD
TxD
2
2
“H”
“H”
“H”
“1”
“0”
“L”
“L”
“L”
“1”
“0”
X
D pin output and R
ST
ST
X
D pin input. The level of any data to be input or output
X
D pin and the input level of the R
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
M16C / 62A Group
X
Mitsubishi microcomputers
D pin at the rising
SP
SP
ST : Start bit
SP : Stop bit