m30262f8gp Renesas Electronics Corporation., m30262f8gp Datasheet - Page 142

• Manufacturer Part Number: m30262f8gp
• Description: Renesas 16-bit Cmos Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

Clock Asynchronous Serial I/O (UART) Mode
136
Figure 1.15.23. Detection timing of a bus collision (in UART mode)
interrupt request signal
Bus collision detection
Bus collision detection
(b) TxD, RxD I/O polarity reverse function (UART2)
(c) Bus collision detection function (UART2)
interrupt request bit
This function reverses/inverts T
output (including the start bit, stop bit(s), and parity bit) is reversed. Set this function to “0” (not re-
versed/inverted) for normal use.
This function samples the output level of the T
edge of the transfer clock; if their values are different, then an interrupt request occurs. Figure 1.15.23
shows the example of detection timing of a bus collision (in UART mode).
Transfer clock
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
RxD
TxD
2
2
H
H
H
1
0
L
L
L
1
0
X
D pin output and R
Renesas Technology Corp.
ST
ST
X
D pin and the input level of the R
X
D pin input. The level of any data to be input or
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
X
M16C/26 Group
D pin at the rising
SP
SP
ST : Start bit
SP : Stop bit