19 SPI
19-12
EPSON
S1C17704 TECHNICAL MANUAL
0x4322: SPI Transmit Data Register (SPI_TXD)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
SPI Transmit
Data Register
(SPI_TXD)
0x4322
(16 bits)
D15–8
–
reserved
–
–
–
0 when being read.
D7–0
SPTDB[7:0]
SPI transmit data buffer
SPTDB7 = MSB
SPTDB0 = LSB
0x0 to 0xff
0x0
R/W
D[15:8] Reserved
D[7:0]
SPTDB[7:0]: SPI Transmit Data Buffer Bits
Set transmit data to be written to the transmit data buffer. (Default: 0x0)
In master mode, data transmission begins by writing data to this register. In slave mode, the register
contents are transferred to the shift register to start data transmission when a clock is input from the
master device.
SPTBE (D0/SPI_ST register) is set to 1 (empty) when the data is transferred to the shift register. At the
same time, a cause of transmit data buffer empty interrupt occurs. The next transmit data can be written
to the register at any time thereafter, even when the SPI is sending data.
The serial-converted data is output from the SDO pin beginning with the MSB, in which the bits set to
1 are output as high-level signals and those set to 0 output as low-level signals.
Содержание S1C17704
Страница 1: ...TECHNICAL MANUAL S1C17704 CMOS 16 BIT SINGLE CHIP MICROCOMPUTER ...
Страница 22: ...1 OVERVIEW 1 10 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 42: ...3 MEMORY MAP BUS CONTROL 3 12 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 82: ...6 INTERRUPT CONTROLLER ITC 6 26 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 108: ...8 CLOCK GENERATOR CLG 8 8 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 112: ...9 PRESCALER PSC 9 4 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 138: ...10 I O PORTS P 10 26 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 156: ...11 16 BIT TIMERS T16 11 18 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 208: ...14 8 BIT OSC1 TIMER T8OSC1 14 16 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 234: ...16 STOPWATCH TIMER SWT 16 14 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 242: ...17 WATCHDOG TIMER WDT 17 8 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 264: ...18 UART 18 22 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 300: ...20 I2C 20 20 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 320: ...21 REMOTE CONTROLLER REMC 21 20 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 360: ...24 ON CHIP DEBUGGER DBG 24 6 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...
Страница 362: ...25 BASIC EXTERNAL WIRING DIAGRAM 25 2 EPSON S1C17704 TECHNICAL MANUAL THIS PAGE IS BLANK ...