Datasheet

Section 19 Keyboard Buffer Control Unit (PS2)
Rev. 2.00 Sep. 28, 2009 Page 592 of 994
REJ09B0452-0200
Bit Bit Name
Initial
Value R/W Description
2 KCIF 0 R/(W)* First KCLK Falling Interrupt Flag
Indicates that the first falling edge of KCLK is detected.
When KCIE and KCIF are set to 1, requests the CPU
an interrupt.
0: [Clearing condition]
After reading KCIF = 1, 0 is written
1: [Setting condition]
When the first falling edge of KCLK is detected
Note that this flag cannot be set when software
standby mode or watch mode is cancelled. (However,
internal flag is set.)
1 KBTE 0 R/(W)* Transmit Completion Flag
Indicates that data transmission is completed. When
KTIE and KBTE are set to 1, requests the CPU an
interrupt.
0: [Clearing condition]
After reading KBTE = 1, 0 is written
1: [Setting Condition]
When all KBTR data has been transmitted (Set at the
eleventh rising edge of the KCLK signal)
0 KTER 0 R Transmit Error
Stores a notification of receive completion. Valid only
when KBTE = 1.
0: 0 received as a notification of receive completion.
1: 1 received as a notification of receive completion.
Note: * Only 0 can be written for clearing the flag.