646
When the value of the serial data is “1”, no pulse is output.
UART frame
Data
IR frame
Data
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
Start
bit
Transmitting
Receiving
Start
bit
Start
bit
Start
bit
Bit
cycle
Pulse width = 1.6
µ
s to
3/16ths bit cycle
Figure 16-22 IrDA Transmit and Receive Operations
(2) Receiving
When receiving, the IR frame data is converted into UART frames by the IrDA interface and input
to the SCI.
When a High pulse is detected, “0” is output. If there is no pulse for the duration of 1 bit, “1” is
output. Pulses of less than the minimum pulse width of 1.41 µs are also recognized as “0” data.
(3) Selecting High Pulse Width
Table 16-12 shows the settings of IrCKS2 to IrCKS0 (for the minimum pulse width), at various
LSI operating frequencies, and various bit rates to set the pulse width when transmitting with a
pulse width less than 3/16ths of the bit rate.
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...