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HD6432142 Datasheet(PDF) 616 Page - Renesas Technology Corp

Part # HD6432142
Description  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
PDF  1177 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6432142 Datasheet(HTML) 616 Page - Renesas Technology Corp

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Section 17 Keyboard Buffer Controller
Rev. 4.00 Sep 27, 2006 page 572 of 1130
REJ09B0327-0400
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 Sample Transmit Processing Flowchart (cont)
1
01
01
7
7
28
9
10
11
KCLK
(pin state)
KD
(pin state)
KCLK
(output)
KD
(output)
KCLK
(input)
KD
(input)
Start bit
Start bit
Parity bit Stop bit
Parity bit Stop bit
I/O inhibit
Receive
completed
notification
[1]
[2] [3]
[4] [5]
[6]
[7]
[8]
Figure 17.6 Transmit Timing



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