Datasheet

Section 19 Host Interface LPC Interface (LPC)
Rev. 3.00 Mar 21, 2006 page 538 of 788
REJ09B0300-0300
R/W
Bit Bit Name Initial Value Slave Host Description
6 CLKREQ 0 R — LCLK Request
Indicates that the host 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 host interface’s SERIRQ signal 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