Renesas Asynchronous SH7145F Manuel d'utilisateur télécharger pdf (Page 3)

SH7145F

Multiprocessor Communications

REJ06B0358-0100O/Rev.1.00 March 2004 Page 3 of 17

2. Functions Used

In this task example the SCI (Serial Communication Interface) is used to perform asynchronous

multiprocessor communications. Figure 2 shows a block diagram of channel 0 (ch0) of the SCI

module. The functions of the elements shown in figure 2 are described below.

TEI_0

TXI_0

RXI_0

ERI_03

SCI0 clock I/O pin

(SCK0)

SCI0 transmit data

output pin

(TXD0)

SCI0 receive data

input pin

(RXD0)

SCI0 asynchronous serial transfer function block

Baud rate generator

Bit rate register 0

(BRR_0)

Clock

Transmit/receive operation control settings

Transfer rate generator

Serial mode register 0

(SMR_0)

Serial control register 0

(SCR_0)

Serial status register 0

(SSR_0)

Serial direction control register 0

(SDCR_0)

Transmit/receive

control circuit

Interrupt

requests

Transmit data control

Transmit shift register 0

(TSR_0)

Transmit data register 0

(TDR_0)

Receive data control

Receive shift register 0

(RSR_0)

Receive data register 0

(RDR_0)

External

clock

Pφ/128

Pφ/32

Pφ/8

Pφ1

On-chip

peripheral cloc

Figure 2 SCI (ch0) Block Diagram

• Asynchronous Mode

Serial data communication is performed using synchronization by character unit. This allows

serial communication with a standard dedicated asynchronous communication chip such as a

Universal Asynchronous Receiver/Transmitter (UART) or Asynchronous Communication

Interface Adapter (ACIA). In addition, the asynchronous mode supports serial communication

among multiple processors (multiprocessor communication function).

1 2 3 4 5 6 7 8 ... 16 17

Commentaires sur ces manuels

Pas de commentaire

Renesas Asynchronous SH7145F Manuel d'utilisateur Page 3

Commentaires sur ces manuels

Produits connexes et manuels pour Mise en réseau Renesas Asynchronous SH7145F