SH7721 datasheet(801/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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801 / 1524 page

Section 22

Analog Front End Interface (AFEIF)

Rev. 3.00 Jan. 18, 2008 Page 739 of 1458

REJ09B0033-0300

• ACTR2

Bit

Bit Name

Initial Value

R/W

Description

15 to 5



All 0

Reserved

These bits are always read as 0. The write

value should always be 0.

DPST

R/W

Dial Pulse Start

Start bit of dial pulse. Dial number within the

DPNQ register is output to AFE_RLYCNT as

specified by PPS, MRCR and MPCR. After all

dial number is output, DPE interrupt is

generated to modify the DPST bit to 0. See

section 22.4.3, DAA Interface for more detail

about dial pulse output sequence. Take care

that AFE_RLYCNT must be "H" to enable dial

pulse generating circuit

PPS

R/W

Dial Pulse Duration Set

0: 10 PPS

1: 20 PPS

RCEN

R/W

Ringing Counter Enable

0: Stop Ringing Counter

1: Start Ringing Counter

Note:

See section 22.4.3, DAA Interface for

more detail about how to count.



Reserved

This bit is always read as 0. The write value

should always be 0.

RLYC

R/W

Relay Control

The signal controls Hook Relay.

0: On hook state. AFE_RLYCNT goes Low

Level.

1: Off hook state. AFE_RLYCNT goes High

Level.

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