AN1500A South African Micro-Electronic Systems, AN1500A Datasheet - Page 2

• Manufacturer Part Number: AN1500A
• Description: Single Chip Telephone Demo Board
• Manufacturer: South African Micro-Electronic Systems

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11.1.1
11.1.2
14.1.1
14.1.2
14.2.1
14.2.2
14.2.3
15.2.1
7.1
7.2
7.3
7.4
7.5
8.1
8.2
8.3
8.4
8.5
8.6
11.1 D
12.1 D
12.2 S
12.3 E
13.1 S
13.2 AC
14.1 F
14.2 F
15.1 L
15.2 DC
15.3 S
15.4 DTMF
15.5 P
15.6 P
AN1500A
SCOPE................................................................................................................................................................. 1
KEY FEATURES ................................................................................................................................................. 1
OTHER APPLICABLE DOCUMENTS AND PAPERS ........................................................................................ 4
REVISION STATUS............................................................................................................................................. 4
SA2532K PIN LAYOUT . ..................................................................................................................................... 4
GENERAL DESCRIPTION .................................................................................................................................. 5
DEMO BOARD CONFIGURATION..................................................................................................................... 5
DESCRIPTION OF KEYBOARD FUNCTIONS................................................................................................... 7
USING THE SA2532K ......................................................................................................................................... 8
SLIDING CURSOR PROTOCOL AND PAUSE INSERTION .......................................................................... 9
AC IMPEDANCE OF THE SA2532K ............................................................................................................... 9
SIDETONE CANCELLATION........................................................................................................................ 10
THE DOUBLE WHEATSTONE PRINCIPLE ................................................................................................. 11
FURTHER ADJUSTMENTS .......................................................................................................................... 13
OFF-HOOK CONDITIONS & DC MASK ...................................................................................................... 15
HOOK TRANSISTOR OPTIONS ................................................................................................................... 17
S
C
S
S
AC
N
F
L
P
T
E
AST NUMBER REDIAL KEY
INE CURRENT PATH
LASH KEYS
ONE
REQUENCY RESPONSE SHAPING
REQUENCY RESPONSE SHAPING
ETTING A
ETTING DIALING MODE
ETTING LINE LOSS COMPENSATION
AUSE KEY
NTER
IDE TONE BALANCE NETWORK
XAMPLE
IDETONE CANCELLATION
PEECH MODE
ULSE DIALING
RE
ONNECTING A HANDSET
UMERIC KEYS
EMO BOARD MEASUREMENTS
UAL
IMPEDANCE
IMPEDANCE
MASK PATH
-
Definition:............................................................................................................................................... 9
Measurement:...................................................................................................................................... 10
Microphone gain setting....................................................................................................................... 13
Tx frequency shaping: ......................................................................................................................... 13
Receive gain setting: ........................................................................................................................... 14
Rx frequency shaping.......................................................................................................................... 14
Metering pulses filtering....................................................................................................................... 14
Setting for low DC mask: ..................................................................................................................... 15
DIGIT
S
/ P
/M5...................................................................................................................................................... 7
DIALING
OFT CLIPPING
ULSE SWITCHING
: ..................................................................................................................................................... 11
, I
/
B LINE CONNECTION
(PAUSE)...................................................................................................................................... 7
NTER
(R,R2) ........................................................................................................................................ 7
.............................................................................................................................................. 16
.............................................................................................................................................. 16
............................................................................................................................................... 6
............................................................................................................................................... 7
............................................................................................................................................. 12
............................................................................................................................................. 15
............................................................................................................................................. 16
-
DIGIT
...................................................................................................................................... 15
: ................................................................................................................................... 11
................................................................................................................................... 6
,
INTER
................................................................................................................................ 6
.............................................................................................................................. 12
............................................................................................................................... 7
(LNR) .................................................................................................................... 7
sames
sames
sames
sames
: ....................................................................................................................... 9
-
:..................................................................................................................... 11
........................................................................................................................ 6
TONE AND ACCESS PAUSES
: T
: R
RANSMIT
TABLE OF CONTENTS
(AGC)...................................................................................................... 6
ECEIVE
................................................................................................... 14
................................................................................................. 13
............................................................................ 17