參數(shù)資料
型號: M30240M4-XXXFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, MICROCONTROLLER, PQFP80
封裝: 0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù): 123/125頁
文件大?。?/td> 753K
代理商: M30240M4-XXXFP
Mitsubishi microcomputers
M16C / 24 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
99
CONFIDENTIAL
Preliminary Specifications REV.B
Specifications in this manual are tentative and subject to change
UART0 through UART2
(c) Function for switching serial data logic (UART2)
When the data logic select bit (bit 6 of address 037D16) is assigned 1, data is inverted in writing to the trans-
mission buffer register or reading the reception buffer register. Figure 92 shows the example of timing for
switching serial data logic.
Figure 92:
Timing for switching serial data logic
(d) TxD, RxD I/O polarity reverse function (UART2)
This function is to reverse TxD pin output and RxD pin input. The level of any data to be input or output (in-
cluding the start bit, stop bit(s), and parity bit) is reversed. Set this function to “0” (not to reverse) for usual use.
(e) Bus collision detection function (UART2)
This function is to sample the output level of the TxD pin and the input level of the RxD pin at the rising edge
of the transfer clock; if their values are different, then an interrupt request occurs. Figure 93 shows the exam-
ple of detection timing of a buss collision (in UART mode).
Figure 93:
Detection timing of a bus collision (in UART mode)
ST : Start bit
P : Even parity
SP : Stop bit
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
ST
SP
ST
D3
D4
D5
D6
D7
P
D0
D1
D2
Transfer clock
TxD2
(no reverse)
TxD2
(reverse)
“H”
“L”
“H”
“L”
“H”
“L”
When LSB first, parity enabled, one stop bit
ST : Start bit
SP : Stop bit
ST
SP
Transfer clock
TxD2
RxD2
Bus collision detection
interrupt request signal
“H”
“L”
“H”
“L”
“H”
“L”
“1”
“0”
Bus collision detection
interrupt request bit
“1”
“0”
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