Datasheet

Section 17 Keyboard Buffer Controller
Rev. 3.00 Mar 21, 2006 page 499 of 788
REJ09B0300-0300
Read KBCRH
Transmit end state
(KCLK = high, KD = high)
Yes
Note: * To switch to reception after transmission, set KBE to 1 (KBBR receive enable) while KCLKI is low.
1
KCLKI = 0?
No
KDI = 0?
Read KBCRH
KCLK = 1?
Yes
Yes
No
No
Error handling
To receive operation or
transmit operation
Keyboard side in data
transmission state.
Execute receive abort
processing.
2
*
[7]
[8]
Figure 17.5 (2) Sample Transmit Processing Flowchart