2) executing – Epson S1C63558 User Manual

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EPSON

S1C63558 TECHNICAL MANUAL

CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Telephone Function)

R10HIZ

R11HIZ

R10 register

R11 register

CTMO(FF13H•D0)

CRMO(FF13H•D1)

CTMUT(FF18H•D0)

CRMUT(FF18H•D1)

R10(XTMUTE) output

R11(XRMUTE) output

Hi-z

"1"

"0"

"1"

"0"

"1"

Fig. 4.14.3.1 Output terminal setting procedure

(2) Executing

After setting, write the corresponding control register to start the execution.
Table 4.14.3.2 lists control registers for executing.

Table 4.14.3.2 Control registers and executing function

Functions

DTMF

Pause
Flash
Hold-line
Handfree

Control registers

TCD3–TCD0 (FF17H)
CTO

(FF16H•D3)

HSON

(FF18H•D3)

TCD3–TCD0 (FF17H)
HSON

(FF18H•D3)

PAUSE

(FF14H•D1)

FLASH

(FF14H•D0)

HOLD

(FF14H•D2)

(FF14H•D3)

Executing function

Dialing tone

Continuous tone output ON/OFF

Hook switch ON/OFF

Dialing pulse

Hook switch ON/OFF

Pause

Flash

Hold-line

Handfree

See Section 4.14.10, "I/O memory of telephone function", for details of each control register.

The hook switch (HSON), continuous tone output (CTO), hold-line (HOLD) and handfree (HF)
functions and their timings are controlled by software. These functions do not generate interrupts.

The HSON that controls the hook switch must be turned ON (off-hook) before executing the tele-
phone function. Actual handset operations are not taken into the dialer. The HSON register allows on-
hook dialing. The hook switch should be connected to an input port (Kxx) and get the switch status
using an input interrupt.

By setting data for the dial number (1 digit) to the TCD register after setting HSON to off-hook, the
dialer output the dialing tone or dialing pulses according to the condition set in (1). When the output
is completed, an interrupt occurs. Use the interrupt for setting the next digit number.

The pause and flash functions are executed by writing "1" to the PAUSE and FLASH bits and will
generate an interrupt after the period of time set in (1) has passed. It is not necessary to turn the
function OFF.