Datasheet

Section 18 LPC Interface (LPC)
Rev. 2.00 Sep. 28, 2009 Page 540 of 870
REJ09B0429-0200
R/W
Bit Bit Name
Initial
Value
Slave Host Description
6 CLKREQ 0 R ⎯ LCLK Request
Indicates that the LPC interface's SERIRQ output is
requesting a restart of LCLK.
0: No LCLK restart request
[Clearing conditions]
• LPC hardware reset or LPC software reset
• LPC hardware shutdown or LPC software
shutdown
• SERIRQ is set to continuous mode
• There are no further interrupts for transfer to the
host in quiet mode
1: LCLK restart request issued
[Setting condition]
In quiet mode, SERIRQ interrupt output becomes
necessary while LCLK is stopped
5 IRQBSY 0 R ⎯ SERIRQ Busy
Indicates that the LPC interface's SERIRQ is engaged
in transfer processing.
0: SERIRQ transfer frame wait state
[Clearing conditions]
• LPC hardware reset or LPC software reset
• LPC hardware shutdown or LPC software
shutdown
• End of SERIRQ transfer frame
1: SERIRQ transfer processing in progress
[Setting condition]
Start of SERIRQ transfer frame