msm6895 Oki Semiconductor, msm6895 Datasheet - Page 25

• Manufacturer Part Number: msm6895
• Description: Multi-function Pcm Codec
• Manufacturer: Oki Semiconductor

Control of function key acknowledge tone
WRITE Mode
Address Data
*4.
*5.
*6.
DB7
0
DB6
1
NTTC = 1 when the initial state is set. NTTC can be set as PBTC when the PB tone is set, but the data written into NTTC in later is valid.
When NTTC = 1, the FTONE (1) and FTONE (2) signals are output from SPO. When NTTC = 0, these signals are output from RPO.
NTTC = 1 when FTONE and PB tone is stopped.
When two or more signals are specified out of IIT, T250 and FTONE, the output signals are compounded by two or three tones.
The definition of Make/Break Timing is as follows;
DB5
1
0
0
AD1 = 0, AD0 = 0
Control Data
NTTC
DB4
*4
X
X
0
0
Make
DB3
X
X
X
X
0
0
DB2
0
0
0
1
0
0
0
0
Break1
DB1
0
1
1
0
0
0
1
1
DB0
1
0
1
0
0
1
0
1
Output Tone
FTONE (1)
FTONE (2)
T250
IIT
Frequency
(Hz)
400
250
1 k
1 k
Suspends the all above tones
Suspends the T250 tone
Break2
Suspends the IIT tone
Suspends the FTONE
Make (Sec) Break1 (Sec) Break2 (Sec)
Continuous
Continuous
0.25
0.1
Make/Break Timing *6
0.25
•
2.25
—
Tone output:
RPO, SPO
Remarks