H8SSLASH2218 datasheet(465/750 Pages) RENESAS

465 / 750 page

Section 12 Serial Communication Interface

Rev.6.00 Jun. 03, 2008 Page 417 of 698

REJ09B0074-0600

Yes

<End>

[1]

Initialization

Start reception

Yes

[4]

Clear RE bit in SCR to 0

Error processing

(Continued on

next page)

[5]

Yes

FER

∨ORER = 1

RDRF = 1

All data received?

Read MPIE bit in SCR

[2]

Read ORER and FER flags in SSR

Read RDRF flag in SSR

[3]

Read receive data in RDR

Yes

This station’s ID?

Read ORER and FER flags in SSR

Yes

Read RDRF flag in SSR

Yes

FER

∨ ORER = 1

Read receive data in RDR

RDRF = 1

[1]

SCI initialization:

The RxD pin is automatically designated as

the receive data input pin.

[2]

ID reception cycle:

Set the MPIE bit in SCR to 1.

[3]

SCI status check, ID reception and

comparison:

Read SSR and check that the RDRF flag is

set to 1, then read the receive data in RDR

and compare it with this station’s ID.

If the data is not this station’s ID, set the MPIE

bit to 1 again, and clear the RDRF flag to 0.

If the data is this station’s ID, clear the RDRF

flag to 0.

[4]

SCI status check and data reception:

Read SSR and check that the RDRF flag is

set to 1, then read the data in RDR.

[5]

Receive error processing and break detection:

If a receive error occurs, read the ORER and

FER flags in SSR to identify the error. After

performing the appropriate error processing,

ensure that the ORER and FER flags are all

cleared to 0.

Reception cannot be resumed if either of

these flags is set to 1.

In the case of a framing error, a break can be

detected by reading the RxD pin value.

Figure 12.16 Sample Multiprocessor Serial Data Reception Flowchart (1)

H8S/2218 Scheda tecnica(PDF) 465 Page - Renesas Technology Corp

H8S/2218 Scheda tecnica(HTML) 465 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL