h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 392

• 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 358 of 544
KCLK
(pin state)
KD
(pin state)
KCLK
(output)
KD
(output)
KCLK
(input)
KD
(input)
Note: * To switch to reception after transmission, set KBE to 1 (KBBR receive enable) while KCLKI is low.
*
(KCLK = high, KD = high)
To receive operation or
[1]
Transmit end state
transmit operation
Read KBCRH
Read KBCRH
KCLKI = 0?
KCLK = 1?
KDI = 0?
[2] [3]
I/O inhibit
1
Yes
Yes
Yes
Figure 14.5 Sample Transmit Processing Flowchart (2)
[4] [5]
Start bit
Start bit
[6]
No
No
No
1
Figure 14.6 Transmit Timing
0
0
[7]
[8]
2
1
1
Error handling
8
7
7
9
Parity bit
Parity bit
Keyboard side in data
Execute receive abort
transmission state.
processing.
10
Stop bit
Stop bit
2
notification
completed
[7]
Receive
11
[8]