REV. M

Page 20

September 1998

AS3502

17) REPETITION ON REGISTER

RO

D7

D6

D5

D4

D3

D2

D1

D0

Name

RO7

RO6

RO5

RO4

RO3

RO2

RO1

RO0

Default

X

X

X

X

X

X

X

X

Bit No

Symbol

Name and Description

D7-D0

RO7-RO0

An 8-bit value written into this register allows to set the repetition on time with 32ms

accuracy. If this time exceeds the repetition period time, continuous operation will be

performed. Repetition times can only be generated when using pulse density volume

control mode.

X

=

Time(ms)

32ms

; X= (1…255)

If pulse width volume control mode is selected, an 8-bit value written into this register

allows to set the duty cycle of the tone ringer outputs with two different accuracies

depending on the PS bit in the volume Control Register 3 :

PS=0: X

=

Time (

µs)

1

µs

; X= (1…255)

PS=1: X

=

Time (

µs)

4

µs

; X= (1…255)

18) CADENCE PERIOD REGISTER

CP

D7

D6

D5

D4

D3

D2

D1

D0

Name

CP7

CP6

CP5

CP4

CP3

CP2

CP1

CP0

Default

X

X

X

X

X

X

X

X

Bit No

Symbol

Name and Description

D7-D0

CP7-CP0

A n 8-bit value written into this register allows to set the cadence period with two

different accuracies. If the SLOW bit in the TC register is set to Low the resolution is

1ms:

X

=

Time(ms)

1(ms)

− 1; X= (1…255).

If the SLOW bit in the TC register is set to High the resolution is 4ms:

X

=

Time(ms)

4(ms)

− 1; X= (1…255).