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MSM66591/ML66592 User's Manual
Chapter 15 Serial Port Functions
<Synchronous Normal Slave Mode (SCI1 only)>
In slave mode, the transmit clock is input externally. The edge is detected synchronizing
with a CLK to generate ST1CLK (refer to Figure 15-32).
The transmit circuit controls the transfer of the transmit data synchronizing with
ST1CLK.
The transmit operation is started with a signal to write transmit data to S1BUF
(WS1BUF: write instruction to S1BUF. For example, a signal that is output if "STB A,
S1BUF" is executed) as the trigger.
If WS1BUF is generated, a transmit start signal (LST1SF) is generated after 1 CLK
(master clock).
The content of S1BUF is transferred to the transmit register at the fall of LST1SF.
At this time, the transmit operation starts, and the ST1FREE signal that indicates
transmitting is set to "L" level.
Then a transmit interrupt (TX1READY) request is generated synchronizing with the
signal (M1S1) that indicates the beginning of an instruction execution, and the interrupt
request flag (QSCI1) is set to "1".
When ST1FREE becomes "L" level, at the rising edge of next CLK, bit 0 (LSB first) is
output from the TXD1 pin. Bit 1 of the transmit data is output from the TXD1 pin at the
rising edge of next CLK after the fall of ST1CLK.
Hereafter, transmit data and a parity bit are added synchronizing with TXC1 (ST1CLK),
according to the specification of ST1CON, and a 1 frame transmission ends.
TXD1 changes after the fall of ST1CLK, that detects the edge of TXC1, which is input
externally.
In this way the receive side fetches TXD1 at the rise of TXC1.
<Synchronous Multiprocessor Communication Slave Mode (SCI1 only)>
In synchronous multiprocessor communication slave mode, the transmit is controlled by
the same timing as synchronous normal slave mode. The differemces are shown
below.
• An MPC bit ("1": address transmitted; "0": data transmitted) is added between the end
of data (MSB bit) and the parity bit.
[Note] SCI0, SCI2, SCI3, and SCI4 do not have synchronous mode.
Summary of Contents for ML66592
Page 15: ...Contents 12 ...
Page 17: ......
Page 18: ...Overview Chapter 1 1 ...
Page 19: ......
Page 30: ...Description of Pins Chapter 2 2 ...
Page 31: ......
Page 44: ...CPU Architecture Chapter 3 3 ...
Page 45: ......
Page 101: ...3 56 MSM66591 ML66592User sManual Chapter 3 CPU Architecture ...
Page 102: ...CPU Control Functions Chapter 4 4 ...
Page 103: ......
Page 111: ...4 8 MSM66591 ML66592User sManual Chapter 4 CPU Control Functions ...
Page 112: ...Memory Control Functions Chapter 5 5 ...
Page 113: ......
Page 117: ...5 4 MSM66591 ML66592User sManual Chapter 5 Memory Control Functions ...
Page 118: ...Port Functions Chapter 6 6 ...
Page 119: ......
Page 152: ...Output Pin Control Pin OE Chapter 7 7 ...
Page 153: ......
Page 155: ...7 2 MSM66591 ML66592User sManual Chapter 7 Output Pin Control Pin OE ...
Page 156: ...Clock Generation Circuit Chapter 8 8 ...
Page 157: ......
Page 160: ...Time Base Counter TBC Chapter 9 9 ...
Page 161: ......
Page 164: ...Watchdog Timer WDT Chapter 10 10 ...
Page 165: ......
Page 170: ...Flexible Timer FTM Chapter 11 11 11 ...
Page 171: ......
Page 213: ...11 42 MSM66591 ML66592User sManual Chapter 11 Flexible Timer FTM ...
Page 214: ...General Purpose 8 Bit Timer Function Chapter 12 12 ...
Page 215: ......
Page 223: ...12 8 MSM66591 ML66592User sManual Chapter 12 General Purpose 8 Bit Timer Function ...
Page 224: ...PWM Functions Chapter 13 13 ...
Page 225: ......
Page 244: ...Baud Rate Generator Functions Chapter 14 14 ...
Page 245: ......
Page 263: ...14 18 MSM66591 ML66592User sManual Chapter 14 Baud Rate Generator Functions ...
Page 264: ...Serial Port Functions Chapter 15 15 ...
Page 265: ......
Page 348: ...A D Converter Functions Chapter 16 16 ...
Page 349: ......
Page 381: ...16 32 MSM66591 ML66592User sManual Chapter 16 A D Converter Functions ...
Page 382: ...Transition Detector Functions Chapter 17 17 ...
Page 383: ......
Page 387: ...17 4 MSM66591 ML66592User sManual Chapter 17 Transition Detector Functions ...
Page 388: ...Peripheral Functions Chapter 18 18 ...
Page 389: ......
Page 392: ...External Interrupt Request Function Chapter 19 19 ...
Page 393: ......
Page 396: ...Interrupt Request Processing Function Chapter 20 20 ...
Page 397: ......
Page 407: ...20 10 MSM66591 ML66592User sManual Chapter 20 Interrupt Request Processing Function ...
Page 408: ...Bus Port Functions Chapter 21 21 ...
Page 409: ......
Page 413: ...21 4 MSM66591 ML66592User sManual Chapter 21 Bus Port Functions ...
Page 414: ...Expansion Port Chapter 22 22 ...
Page 415: ......
Page 420: ...Serial Port with FIFO SCI5 Chapter 23 23 ...
Page 421: ......
Page 431: ...23 10 MSM66591 ML66592User sManual Chapter 23 Serial Port with FIFO SCI5 ...
Page 432: ...RAM Monitor Function Chapter 24 24 ...
Page 433: ......
Page 441: ...24 8 MSM66591 ML66592User sManual Chapter 24 RAM Monitor Function ...
Page 442: ...25 Electrical Characteristics Chapter 25 ...
Page 443: ......
Page 458: ...Package Dimensions Chapter 26 26 ...
Page 459: ......
Page 461: ...26 2 MSM66591 ML66592User sManual Chapter 26 Package Dimensions ...
Page 462: ...Revision History Chapter 27 27 ...
Page 463: ......
Page 465: ...27 2 MSM66591 ML66592User sManual Chapter 27 Revision History ...