H8SLASH3028F datasheet(484/923 Pages) RENESAS

Part #	H8/3028F

Description	Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

PDF	923 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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484 / 923 page

Rev. 2.00, 09/03, page 454 of 890

13.2

13.2.1

Receive Shift Register (RSR)

RSR is the register that receives serial data.

Bit

654321

Read/Write

—

——————

—

The SCI loads serial data input at the RxD pin into RSR in the order received, LSB (bit 0) first,

thereby converting the data to parallel data. When one byte of data has been received, it is

automatically transferred to RDR. The CPU cannot read or write RSR directly.

13.2.2

Receive Data Register (RDR)

RDR is the register that stores received serial data.

Bit

654321

Initial value

Read/Write

RRRRRR

When the SCI has received one byte of serial data, it transfers the received data from RSR into

RDR for storage, completing the receive operation. RSR is then ready to receive the next data.

This double-buffering allows data to be received continuously.

RDR is a read-only register. Its contents cannot be modified by the CPU. RDR is initialized to

H'00 by a reset and in standby mode.

H8/3028F Datasheet(PDF) 484 Page - Renesas Technology Corp