HD6433713 datasheet(200/324 Pages) RENESAS

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Section 11 SCI2

11.1 Overview

Serial communication interface 2 (SCI2) has a 32-byte data buffer, for synchronous serial transfer

of up to 32 bytes of data in one operation.

11.1.1 Features

SCI2 features are as follows.

•

Automatic transfer of up to 32 bytes of data

•

Choice of internal clock sources (

φ/8, φ/4, φ/2) or an external clock

•

Interrupts requested at completion of transfer or when error occurs

11.1.2 Block Diagram

Figure 11-1 shows a block diagram of SCI2.

Figure 11-1 Block Diagram of SCI2

Prescaler S

(13 bits)

Shift clock

generator circuit

SCR2

Address decoder and

R/W controller

Data buffer

(32 bytes)

Bit counter

STAR

Byte counter

Comparator circuit

EDAR

Shift register

Internal data bus

SCK

IRRS2

SI /CS

Notation:

STAR:

EDAR:

IRRS2:

Start address register

End address register

Serial communication interface 2 interrupt request flag (interrupt request register 3)

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