H8SSLASH2224 datasheet(607/1071 Pages) RENESAS

Il numero della parte	H8S/2224

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	1071 Pages

Scroll/Zoom	100%

Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

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607 / 1071 page

Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]

Rev. 5.00 Aug 08, 2006 page 521 of 982

REJ09B0054-0500

Bit

Bit Name

Initial

Value

R/W

Description

ACK

R/W

Acknowledge bit Status

Indicates the data received in the acknowledge bit of the

data field.

• Acknowledge bit other than in the data field

The IEB terminates the transmission and enters the

wait state if a NAK is received. In this case, this bit and

the TxE flag are set to 1.

• Acknowledge bit in the data field

The IEB retransmits data up to the maximum number of

bytes defined by communications mode until an ACK is

received from the receive unit if a NAK is received from

the receive unit during data field transmission. In this

case, when an ACK is received from the receive unit

during retransmission, this flag is not set and

transmission will be continued. When transmission is

terminated without receiving an ACK, this flag is set to

Note: This flag is invalid in broadcast communications.

[Setting condition]

When the acknowledge bit of 1 (NAK) is detected

[Clearing condition]

When writing 0 after reading ACK = 1

H8S/2224 Scheda tecnica(PDF) 607 Page - Renesas Technology Corp