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參數(shù)資料
| 型號(hào)： | MSM80C154SJS |
| 廠商： | OKI ELECTRIC INDUSTRY CO LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 24 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | 0.650 INCH, 1.27 MM PITCH, PLASTIC, QFJ-44 |
| 文件頁(yè)數(shù)： | 32/378頁(yè) |
| 文件大?。?/td> | 1946K |
| 代理商： | MSM80C154SJS |
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MSM80C154S/83C154S/85C154HVS
120
B = fOSC
×
65536-DRCAP2
1
×
16
1
2
1 ×
where B is the baud rate, fOSC the fundamental oscillator (XTAL12) frequency, and DRCAP2
the contents of RCAP2L and RCAP2H (expressed in decimal).
4.6.3.4.3 Mode 3 transmit operation
The transmit basic clock (TXCLOCK in Figure 4-36) is obtained from a hexadecimal free-run
counter overflow where timer/counter 1 or timer/counter 2 overflow is used as the clock.
Transmission is commenced when transmit data is written in SBUF.
The start bit, the eight SBUF data bits (with the LSB first), TB8, and the stop bit are transmitted
sequentially from the TXD synchronized with the basic clock.
As soon as the TB8 output has been completed, the transmit circuit is initialized, and the T1
flag is set at the first M1S3 after the completion of that output.
4.6.3.4.4 Mode 3 receive operation
The receive circuit timing is generated by a hexadecimal counter overflow where timer/
counter 1 or timer/counter 2 overflow is used as the clock, and the input data received from
the RXD is bit synchronized. That is, at the same time that reception is started following input
of the start bit, the hexadecimal counter commences to count up, and with one complete
round of the hexadecimal counter corresponding to one bit of received data, reception is
continued by the receive circuit. Therefore, timer/counter 1 must be set so that the period of
a single round of the hexadecimal counter is equal to the reception data baud rate.
The RXD change from “1” to “0” is regarded as the beginning of the start bit where reception
is commenced.
When this “1” to “0” RXD change is detected, the hexadecimal counter which had been
stopped in reset status commences to count up. When the hexadecimal counter is in state
7, 8, and 9, the start bit is sampled, and is accepted as valid if at least two of the three sampled
values are “0”, thereby enabling data reception to continue. If two or three of the sampled
values are “1”, the start bit becomes invalid, and the receive circuit is initialized when the
hexadecimal counter reaches state 10.
The reception data is sampled when the hexadecimal counter is in state 7, 8, and 9, and the
more common value of the three sampled values is read sequentially as data into the input
shift register.
If the hexadecimal counter is in state 10 during the period of the next bit (that is, the multi-
purpose data bit) after the eight bits of data have been received, and if the conditions stated
below are satisfied, the input shift register data (the LSB being read first) is loaded into SBUF,
and the sampled multi-purpose data bit is read into RB8. And when the hexadecimal counter
is in state 10 during the period of the next after that (that is, the stop bit) the receive circuit
is initialized.
The RI flag is set at the first M1S3 after that.
Conditions: (1) RI=“0”
(2) SM2=“0”, or SM2=“1” and sampled multi-purpose data bit=“1”
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MSM83C154S-XXXGS-2K | 8-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP44 |
| MSM83C154S-XXXRS | 8-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP40 |
| MSP2EZ10D1TR | 10 V, 1.19 W, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE, DO-204AL |
| MSP2EZ110D5TR | 110 V, 1.19 W, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE, DO-204AL |
| MSP2EZ120D1TR | 120 V, 1.19 W, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE, DO-204AL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSM80C154S-JS | 制造商:ROHM Semiconductor 功能描述: |
| MSM80C154SRS | 制造商:ROHM Semiconductor 功能描述: |
| MSM80C31 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:CMOS 8-Bit Microcontroller |
| MSM80C31F | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:CMOS 8-Bit Microcontroller |
| MSM80C35 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:CMOS 8-Bit Microcontroller |
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