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Section 19 Keyboard Buffer Control Unit (PS2)
Bit
Bit Name
2
KCIF
1
KBTE
0
KTER
Note:
*
Only 0 can be written for clearing the flag.
Rev. 1.00 May 09, 2008 Page 558 of 954
REJ09B0462-0100
Initial
Value
R/W
Description
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.)
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
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.
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