15-78
MSM66591/ML66592 User's Manual
Chapter 15 Serial Port Functions
<Synchronous Normal Slave Mode (SCI1 only)>
The receive operation starts when SR1REN of SR1CON is set to "1" by the program.
SR1FREE, that indicates receiving, becomes "L" level, and the receive shift clock to
input to the RXC1 pin is accepted (refer to Figure 15-35).
The receive shift clock detects the edge synchronizing with the CLK to generate
SR1CLK.
Receive data is controlled synchronizing with SR1CLK.
If the RXC1 pin becomes "L" level, and then becomes "H" level, the receive shift clock
SR1CLK is generated by the edge detection circuit.
If SR1CLK is generated, the receive data just sampled the RXD1 pin is shifted in the
receive register.
The RXD1 pin is sampled while the RXC1 pin is in "L" level. The timing to shift in the
receive register occurs after the RXC1 pin rises. Therefore the transmit side transmits
data synchronizing with the fall of the RXC1 pin, which is the fall of the transmit shift
clock.
Hereafter, receive data is shifted in the receive register sequentially, synchronizing with
the receive shift clock, which is input according to the specification of SR1CON.
If the receive shift clock finally rises, SR1CLK acquired by edge detection is generated,
and the final receive data is input. Then 1 CLK later, the receive end signal LSR1BUF is
generated.
If LSR1BUF is generated, the content of the receive register (receive data) is trans-
ferred to S1BUF, an overrun error and parity error (if parity bit exists) are set, the
receive interrupt request signal (RX1READY) is generated, synchronizing with the
M1S1 signal that indicates the beginning of an instruction, and the interrupt request flag
(QSCI1) is set to "1". Then SR1FREE becomes "H" level. At this time SR1REN of
SR1CON does not become "L" level, and the receive operation starts again if the next
receive shift clock is input.
<Synchronous Multiprocessor Communication Slave Mode (SCI1 only)>
In synchronous multiprocessor communication slave mode, receive is controlled by the
same timing as synchronous normal slave mode. The differences are shown below.
• Setting of multiprocessor communication error
• If SR1MPC of SR1CON is "0", receive data is accepted regardless of the MPC bit of
receive data. When SR1MPC of SR1CON is "1", receive data is accepted if the MPC
bit of receive data is "1", but receive data is not accepted if the MPC bit of receive
data is "0". This means that data shifted in the shift register will not be loaded to
S1BUF, and also that an interrupt request will not be generated.
Содержание MSM66591
Страница 1: ...MSM66591 ML66592 User s Manual CMOS 16 bit microcontroller FEUL66591 66592 01 Issue Date Mar 4 2002...
Страница 15: ...Contents 12...
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Страница 18: ...Overview Chapter 1 1...
Страница 19: ......
Страница 30: ...Description of Pins Chapter 2 2...
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Страница 44: ...CPU Architecture Chapter 3 3...
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Страница 101: ...3 56 MSM66591 ML66592User sManual Chapter 3 CPU Architecture...
Страница 102: ...CPU Control Functions Chapter 4 4...
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Страница 111: ...4 8 MSM66591 ML66592User sManual Chapter 4 CPU Control Functions...
Страница 112: ...Memory Control Functions Chapter 5 5...
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Страница 117: ...5 4 MSM66591 ML66592User sManual Chapter 5 Memory Control Functions...
Страница 118: ...Port Functions Chapter 6 6...
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Страница 152: ...Output Pin Control Pin OE Chapter 7 7...
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Страница 155: ...7 2 MSM66591 ML66592User sManual Chapter 7 Output Pin Control Pin OE...
Страница 156: ...Clock Generation Circuit Chapter 8 8...
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Страница 160: ...Time Base Counter TBC Chapter 9 9...
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Страница 164: ...Watchdog Timer WDT Chapter 10 10...
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Страница 170: ...Flexible Timer FTM Chapter 11 11 11...
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Страница 213: ...11 42 MSM66591 ML66592User sManual Chapter 11 Flexible Timer FTM...
Страница 214: ...General Purpose 8 Bit Timer Function Chapter 12 12...
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Страница 223: ...12 8 MSM66591 ML66592User sManual Chapter 12 General Purpose 8 Bit Timer Function...
Страница 224: ...PWM Functions Chapter 13 13...
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Страница 244: ...Baud Rate Generator Functions Chapter 14 14...
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Страница 263: ...14 18 MSM66591 ML66592User sManual Chapter 14 Baud Rate Generator Functions...
Страница 264: ...Serial Port Functions Chapter 15 15...
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Страница 348: ...A D Converter Functions Chapter 16 16...
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Страница 381: ...16 32 MSM66591 ML66592User sManual Chapter 16 A D Converter Functions...
Страница 382: ...Transition Detector Functions Chapter 17 17...
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Страница 387: ...17 4 MSM66591 ML66592User sManual Chapter 17 Transition Detector Functions...
Страница 388: ...Peripheral Functions Chapter 18 18...
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Страница 392: ...External Interrupt Request Function Chapter 19 19...
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Страница 396: ...Interrupt Request Processing Function Chapter 20 20...
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Страница 407: ...20 10 MSM66591 ML66592User sManual Chapter 20 Interrupt Request Processing Function...
Страница 408: ...Bus Port Functions Chapter 21 21...
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Страница 413: ...21 4 MSM66591 ML66592User sManual Chapter 21 Bus Port Functions...
Страница 414: ...Expansion Port Chapter 22 22...
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Страница 420: ...Serial Port with FIFO SCI5 Chapter 23 23...
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Страница 431: ...23 10 MSM66591 ML66592User sManual Chapter 23 Serial Port with FIFO SCI5...
Страница 432: ...RAM Monitor Function Chapter 24 24...
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Страница 441: ...24 8 MSM66591 ML66592User sManual Chapter 24 RAM Monitor Function...
Страница 442: ...25 Electrical Characteristics Chapter 25...
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Страница 458: ...Package Dimensions Chapter 26 26...
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Страница 461: ...26 2 MSM66591 ML66592User sManual Chapter 26 Package Dimensions...
Страница 462: ...Revision History Chapter 27 27...
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Страница 465: ...27 2 MSM66591 ML66592User sManual Chapter 27 Revision History...