h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 555

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Disable receive abort
RXCR3 to RXCR0
Receive state
Read KBCRH
Read KBCRL
KBF = 0?
requests
Figure 17.7 (1) Sample Receive Abort Processing Flowchart
B'1001?
Start
Yes
Yes
[3]
No
No
and clear receive counter)
(disable KBBR reception
(receive abort request)
command transmission
To transmit operation
Clear I/O inhibit
Transmit data
(KCLKO = 1)
Processing 1
KCLKO = 0
Set start bit
(KDO = 0)
Retransmit
KBE = 0
(data)?
Yes
[1]
Rev. 3.00 Mar 21, 2006 page 501 of 788
[2]
Section 17 Keyboard Buffer Controller
No
[1] Read KBCRL, and if KBF = 1,
[2] Read KBCRH, and if the value of
[3] If the value of bits RXCR3 to
perform processing 1.
bits RXCR3 to RXCR0 is less than
B'1001, write 0 in KCLKO to abort
reception.
If the value of bits RXCR3 to
RXCR0 is B'1001 or greater, wait
until stop bit reception is
completed, then perform receive
data processing, and proceed to
the next operation.
RXCR0 is B'1001 or greater, the
parity bit is being received. With
the PS2 interface, a receive abort
request following parity bit
reception is disabled. Wait until
stop bit reception is completed,
perform receive data processing
and clear the KBF flag, then
proceed to the next operation.
and clear receive counter)
(disable KBBR reception
(enable KB operation)
To receive operation
Clear I/O inhibit
(KCLKO = 1)
KBE = 0
KBE = 1
REJ09B0300-0300