Section 19 Keyboard Buffer Control Unit (PS2)
Rev. 1.00 Apr. 28, 2008 Page 598 of 994
REJ09B0452-0100
19.3.5
Keyboard Data Buffer Register (KBBR)
KBBR stores receive data. Its value is valid only when KBF = 1.
Bit Bit
Name
Initial
Value R/W Description
7
6
5
4
3
2
1
0
KB7
KB6
KB5
KB4
KB3
KB2
KB1
KB0
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R
Keyboard Data 7 to 0
8-bit read only data.
Initialized to H'00 by a reset or when KBIOE is cleared
to 0.
19.3.6
Keyboard Buffer Transmit Data Register (KBTR)
KBTR stores transmit data.
Bit Bit
Name
Initial
Value R/W Description
7
6
5
4
3
2
1
0
KBT7
KBT6
KBT5
KBT4
KBT3
KBT2
KBT1
KBT0
1
1
1
1
1
1
1
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Keyboard Buffer Transmit Data Register 7 to 0
Initialized to H'00 at reset.
Содержание H8S/2100 Series
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