Renesas R5S72643 User Manual

 

 

Section 16   Renesas Serial Peripheral Interface 

 

 

Page 806 of 2108 

 

R01UH0134EJ0400  Rev. 4.00 

 

 Sep 

24, 

2014 

SH7262 Group, SH7264 Group

5, 4 

TXTRG[1:0]  00 

R/W 

Transmit Buffer Data Triggering Number 

Specifies the timing at which the transmit buffer 
empty state is determined, that is when the SPTEF 
flag in the status register is set. When the number of 
bytes of data in the transmit buffer (SPTX) is equal to 
or less than the specified triggering number, the 
SPTEF flag is set to 1. 

00: 7 bytes (1)* 

01: 6 bytes (2)* 

10: 4 bytes (4)* 

11: 0 bytes (8)* 

Note: The value in the parenthesis shows the 

number of available bytes in the transmit buffer 
(SPTX). 

3 

 0 R 

Reserved 

The write value should always be 0. Otherwise, 
operation cannot be guaranteed. 

2 to 0 

RXTRG[2:0]  000 

R/W 

Receive Buffer Data Triggering Number 

Specifies the timing at which the receive buffer full 
state is determined, that is when the SPRF flag in the 
status register is set. When the number of bytes of 
data in the receive buffer (SPRX) is equal to or 
greater than the specified triggering number, the 
SPRF flag is set to 1. 

000: 1 byte (31)* 

001: 2 bytes (30)* 

010: 4 bytes (28)* 

011: 8 bytes (24)* 

100: 16 bytes (16)* 

101: 24 bytes (8)* 

110: 32 bytes (0)* 

111: 5 bytes (27)* 

Note: * The value in the parenthesis shows the 

number of available bytes in the receive 
buffer (SPRX).