FX629 Consumer Microcircuits Limited, FX629 Datasheet - Page 5

• Manufacturer Part Number: FX629
• Description: Delta Modulation Codec
• Manufacturer: Consumer Microcircuits Limited

Codec Timing Information
Digital to Analogue Performance ......
Decoder Input pin, the analogue signals measured at the Decoder Output pin are 800Hz
described.
Fig.4 Codec Timing Diagrams
Table 1 Bit Sequence Tests and Results
Sample Rate
TIMING
t
t
CH
CL
16kbit/s
32kbit/s
16kbit/s
32kbits
Clock '0' Pulse Width
Clock '1' Pulse Width
DECODER TIMING
MULTIPLEXING FUNCTION
ENCODER
OUTPUT
ENCODER
CLOCK
ENCODER DATA
OUTPUT
DECODER
CLOCK
DECODER DATA
INPUT
DATA ENABLE
ENCODER TIMING
1.0 s Min.
1.0 s Min.
DATA CLOCKED
Bit Sequence at Decoder Input
11011011010010010010
1101101101010100100100100100101010110110
11111011010000010010
1111110110101010000100000010010101011110
HIGH Z
t
t
DR
PCO
t
t
t
t
IR
IF
DR
CH
Clock Fall Time
Clock Rise Time
Data Rise Time
100ns Typ.
100ns Typ.
100ns Typ.
DATA CLOCKED
t
SU
DATA TRUE TIME
t
IF
Using the bit sequence tests shown in Table 1 (below) at the
t
CL
t
H
t
t
t
SU
H
DF
5
Data Hold Time
Data Fall Time
Data Set-up Time
100ns Typ.
450ns Min.
600ns Min.
t
IR
t
CH
t
DF
HIGH Z
“Run of Threes”
t
t
Xtal Input Frequency
SU
PCO
+ t
Clock to Output Delay Time
H
(%)
30
30
= Data True Time
1.024MHz.
0
0
750ns Max.
10Hz at the levels
Output Level
-29.2
-30.0
at 800Hz
(dBm0)
0
0
1
1
2
2