mt88l85anr1 Zarlink Semiconductor, mt88l85anr1 Datasheet - Page 18

• Manufacturer Part Number: mt88l85anr1
• Description: 3 V Integrated Dtmf Transceiver With Power-down And Adaptive Micro Interface
• Manufacturer: Zarlink Semiconductor

* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
Absolute Maximum Ratings*
A software reset must be included at the beginning of all programs to initialize the control registers after power up.
Description:
1) Read Status Register
2) Write to Control Register
3) Write to Control Register
4) Write to Control Register
5) Write to Control Register
6) Read Status Register
Transmit DTMF tones of 50 ms burst/50 ms pause and Receive DTMF Tones.
Sequence:
1) Write to Control Register A
2) Write to Control Register B
3) Write to Transmit Data Register
4) Wait for an Interrupt or Poll Status Register
5) Read the Status Register
NOTE: IN THE TX BURST MODE, STATUS REGISTER BIT 1 WILL NOT BE SET UNTIL 100 ms (
DATA REGISTER. IN EXTENDED BURST MODE THIS TIME WILL BE DOUBLED TO 200 ms (
1
2
3
4
5
(tone out, DTMF, IRQ, Select Control Register B)
(burst mode)
(send a digit 7)
-if bit 1 is set, the Tx is ready for the next tone, in which case...
Write to Transmit Register
(send a digit 5)
-if bit 2 is set, a DTMF tone has been received, in which case....
Read the Receive Data Register
-if both bits are set...
Read the Receive Data Register
Write to Transmit Data Register
Power supply voltage V
Voltage on any pin
Current at any pin (Except V
Storage temperature
Package power dissipation
TYPICAL CONTROL SEQUENCE FOR BURST MODE APPLICATIONS
Parameter
DD
-V
SS
DD
and
V
INITIALIZATION PROCEDURE
Figure 15 - Application Notes
SS
)
Zarlink Semiconductor Inc.
MT88L85
RS0
RS0
1
1
1
1
1
1
1
1
0
1
0
0
0
0
18
Motorola
R/W
R/W
1
0
0
0
0
1
0
0
0
1
0
1
1
0
V
Symbol
DD
T
P
V
-V
ST
D
WR RD
WR RD
I
±
1
0
0
0
0
1
0
0
0
1
0
1
1
0
SS
4 ms)
±
Intel
2 ms) AFTER THE DATA IS WRITTEN TO THE TX
1
1
1
1
1
0
0
1
1
1
0
0
0
1
V
Min.
SS
-65
-0.3
b3
b3
X
0
0
1
0
X
1
0
0
X
0
X
X
0
Data
b2
b2
X
0
0
0
0
X
1
0
1
X
1
X
X
1
V
DD
+150
Max.
1000
5.5
10
+0.3
b1
b1
X
0
0
0
0
X
0
0
1
X
0
X
X
0
Data Sheet
b0
b0
Units
X
0
0
0
0
X
1
0
1
X
1
X
X
1
mW
mA
°C
V
V