Renesas Asynchronous SH7145F Manual de usuario descargar pdf (Pagina 7)

SH7145F

Multiprocessor Communications

REJ06B0358-0100O/Rev.1.00 March 2004 Page 7 of 17

RXD0

(pin)

RDRF

(SSR_0 bit)

MPB

(1)

(2)

(3)

(4)

(5)

(6)

(8)

(9)

(10)(11)

MPIE

(SCR_0 bit)

(7)

MPB

Stop

bit

Start

bit

Start

bit

Start

bit

Stop

bit

Data bits D0 to D7

Figure 4 Reception Operation when IDs Match

Table 4 Processing

Software Processing Hardware Processing

(1) ― Clear MPIE flag in SCR_0 to 0 (receive ID data)

(2) ― RSR_0 receives serial data and transfers it to

RDR_0

(3) ― Set RDRF flag in SSR_1 to 1

(4) Read data from RDR_1 ―

(5) Compare with own ID ―

(6) Clear RDRF flag in SSR_1 to 0 ―

(7) ― Receive data transmitted when MPIE flag value

was 1 because MPB bit is 1

(8) ― RSR_0 receives serial data and transfers it to

RDR_0

(9) ― Set RDRF flag in SSR_1 to 1

(10) SetMPIEflaginSCR_0to1 ―

(11) Read data from RDR_1 ―

1 2 3 4 5 6 7 8 9 10 11 12 ... 16 17

APPLICATION NOTE 1
Multiprocessor Communications 1
1. Specifications 2
2. Functions Used 3
• Bit Rate Register (BRR_0) 5
3. Operation 6
Table 4 Processing 7
4. Software 8
5. Flowcharts 11
(2) SCI0 Initialize Routine 12
(3) Data Receive Routine 13
(4) Data Transfer Routine 13
6. Program Listing 14

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