HD64F2149YV datasheet(571/1075 Pages) RENESAS

Nome de Peças	HD64F2149YV

Descrição Electrónicos	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

PDF	1075 Pages

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Fabricante Electrônico	RENESAS [Renesas Technology Corp]

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Section 16 I

2C Bus Interface

Rev. 3.00 Jan 18, 2006 page 543 of 1044

REJ09B0280-0300

16.3.11

Initialization of Internal State

The IIC has a function for forcible initialization of its internal state if a deadlock occurs during

communication.

Initialization is executed in accordance with the setting of bits CLR3 to CLR0 in the DDCSWR

Switch Register (DDCSWR).

Scope of Initialization: The initialization executed by this function covers the following items:

• TDRE and RDRF internal flags

• Transmit/receive sequencer and internal operating clock counter

• Internal latches for retaining the output state of the SCL and SDA pins (wait, clock, data

output, etc.)

The following items are not initialized:

• Actual register values (ICDR, SAR, SARX, ICMR, ICCR, ICSR, DDCSWR, STCR)

• Internal latches used to retain register read information for setting/clearing flags in the ICMR,

ICCR, ICSR, and DDCSWR registers

• The value of the ICMR register bit counter (BC2 to BC0)

• Generated interrupt sources (interrupt sources transferred to the interrupt controller)

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