h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 394

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Rev. 1.00, 05/04, page 360 of 544
KCLK
(pin state)
KD
(pin state)
KCLK
(input)
KCLK
(output)
KD
(input)
KD
(output)
Transmit enabled state.
If there is transmit data, the data is transmitted.
Receive data processing
Receive operation ends
Reception in progress
Clear KBF flag
(KCLK = High)
Processing 1
Figure 14.7 Sample Receive Abort Processing Flowchart (2)
normally
Figure 14.8 Receive Abort and Transmit Start
(Transmission/Reception Switchover) Timing
Keyboard side monitors clock during
receive operation (transmit operation
as seen from keyboard), and aborts
receive operation during this period.
[1]
Receive abort request
[1] On the system side, drive the KCLK pin low, setting
the I/O inhibit state.
Transmit operation
Start bit