Renesas H8S/2100 Series, Руководство по оборудованию

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Section 20 LPC Interface (LPC)
Rev. 1.00 Apr. 28, 2008 Page 641 of 994
REJ09B0452-0100
•
STR3 (TWRE = 1 or SELSTR3 = 0)
R/W
Bit Bit Name Initial Value Slave Host Description
7 IBF3B 0 R R Bidirectional Data Register Input Buffer Full Flag
This is an internal interrupt source to the slave (this
LSI).
0: [Clearing condition]
When the slave reads TWR15
1: [Setting condition]
When the host writes to TWR15 in I/O write cycle
6 OBF3B 0 R/(W)
*
R Bidirectional Data Register Output Buffer Full Flag
0: [Clearing conditions]
•
When the host reads TWR15 in I/O read cycle
•
When the slave writes 0 to the OBF3B bit
1: [Setting condition]
When the slave writes to TWR15
5 MWMF 0 R R Master Write Mode Flag
0: [Clearing condition]
When the slave reads TWR15
1: [Setting condition]
When the host writes to TWR0 in I/O write cycle
while SWMF = 0
4 SWMF 0 R/(W) * R Slave Write Mode Flag
In the event of simultaneous writes by the master
and the slave, the master write has priority.
0: [Clearing conditions]
•
When the host reads TWR15 in I/O read cycle
•
When the slave writes 0 to the SWMF bit
1: [Setting condition]
When the slave writes to TWR0 while MWMF = 0