H8SSLASH2225 datasheet(589/1071 Pages) RENESAS

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

Rev. 5.00 Aug 08, 2006 page 503 of 982

REJ09B0054-0500

Bit

Bit Name

Initial

Value

R/W

Description

CTL3*

CTL2

CTL1

CTL0

R/W

Control bits

Set the control bits in the control field for master

transmission.

0000: Reads slave status

0001: Undefined. Setting prohibited.

0010: Undefined. Setting prohibited.

0011: Reads data and locks*

0100: Reads locked address (lower 8 bits)

0101: Reads locked address (upper 4 bits)

0110: Reads slave status and unlocks*

0111: Reads data

1000: Undefined. Setting prohibited.

1001: Undefined. Setting prohibited.

1010: Writes command and locks*

1011: Writes data and locks*

1100: Undefined. Setting prohibited.

1101: Undefined. Setting prohibited.

1110: Writes command

1111: Writes data

Notes: 1. CTL3 decides the data transfer direction of the message length bits in the message

length field and data bits in the data field:

CTL3 = 1: Transfer is performed from master unit to slave unit

CTL3 = 0: Transfer is performed from slave unit to master unit

2. Control bits to lock and unlock

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