SH7708 datasheet(401/633 Pages) RENESAS

401 / 633 page

383

Figures 13.13 (a) and (b) show examples of SCI receive operation using a multiprocessor format.

RDRF

MPIE

RDR

value

ID1

RXI interrupt request

(multiprocessor interrupt),

MPIE = 0

RXI interrupt

handler reads RDR

data and clears

RDRF bit to 0

ID is not station’s

ID, so MPIE bit is

set to 1 again

No RXI interrupt,

RDR state

is maintained

Stop

bit

MPB

Serial

data

Start

bit

Data

(ID1)

Data

(data 1)

Start

bit

MPB

Stop

bit

Idle

(mark)

state

Figure 13.13 (a) Example of SCI Receive Operation: Own ID Does Not Match Data (8-Bit

Data with Multiprocessor Bit and One Stop Bit)

RDRF

MPIE

RDR

value

ID1

ID2

Data2

MPB

Serial

data

Start

bit

Data

(ID2)

Data

(Data 2)

Stop

bit

Start

bit

Stop

bit

Idle

(mark)

state

RXI interrupt

request

(multiprocessor

interrupt),

MPIE = 0

RXI interrupt handler

reads RDR data

and clears

RDRF bit to 0

ID is that of station,

so reception

continues unchanged

and data is received

by the RXI interrupt

handler

MPIE bit

set to 1

again

Figure 13.13 (b) Example of SCI Receive Operation: Own ID Matches Data

(8-Bit Data with Multiprocessor Bit and One Stop Bit)

SH7708 Datenblatt(PDF) 401 Page - Renesas Technology Corp

SH7708 Datenblatt(HTML) 401 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

Datenblatt Download

Link URL