UPD9903 Datasheet, PDF (5/28 Pages) NEC – UPD9903 ANALOG SUBSCRIBER LINE LSI DIGITAL CODEC

µPD9903
1. PIN FUNCTIONS
Number
1-10
11
12
13
14
15
16
17
Pin Name
NC
AVDD
DVDD1
DVDD2
AUX/MODE
BSY
SUS
RST
18
EXS
19
EXD
20
HWR
21
DCLK
22
FS
23
HWX
24
TYPE
25
RTIN1
26
RTIN0
27
RC3
28
RC2
29
RC1
30
BCUT
31
ALM
32
PD
33
DGND2
34
DGND1
35
SUB
36
AGND
37
ACOMIN
38
ACOMOUT
39
AOUT
40
AIN
41
AGDT
42
ASCN
43
BBIN
I/O
Function
–
Leave this pin open.
–
+5 V power supply (analog)
–
+5 V power supply (digital)
–
+5 V power supply (digital)
I
External signaling input
O
BUSY LED driver output
O
SUS LED driver output
I
Pin for reset input and power-on reset
H: HWX valid, L: HWX output’s internal F/F clear status
O
SIPO sync signal output for expansion port ^{Note 1}
O
SIPO serial data output for expansion port ^{Note 1}
I
Reception highway input [PCM data (8-bit) + CTL data (8-bit)]
I
Clock input (2.048 MHz)
I
8-kHz sync input
Rising : HWR PCM data input start
Rising : HWX PCM data output start
Falling: HWR CTL data input start
Falling: HWX SCN data output start
O
Transmission highway output [PCM data (8-bit) + SCN data (8-bit)]
O
HWX data enable
I
Ring-Trip signal input 2
I
Ring-Trip signal input 1
O
Relay control for network testing
O
Relay control for line testing
O
Relay control for ringer transmit
O
High and wet control output
[to the µPC7073’s pin 22]
[to the µPC7073’s pin 21]
[to the µPC7073’s pin 20]
[to the µPC7073’s pin 19]
O
Control output for ground-fault/power line contact protection mode
[to the µPC7073’s pin 18]
O
Power-down control output
[to the µPC7073’s pin 17]
–
Digital ground 2 ^{Note 2}
–
Digital ground 1 ^{Note 2}
–
Substrate ground ^{Note 2}
–
Analog ground ^{Note 2}
I
Signal ground input ^{Note 3}
O
Signal ground output ^{Note 3}
O
Analog signal output for receive side
[to the µPC7073’s pin 11]
[to the µPC7073’s pin 11]
[to the µPC7073’s pin 10]
I
Analog signal input for transmit side
I
Tip-Ring sum current detection input
I
Tip-Ring difference current detection input
[to the µPC7073’s pin 9]
[to the µPC7073’s pin 8]
[to the µPC7073’s pin 7]
I
VBB voltage information input
[to the µPC7073’s pin 6]
Notes 1. SIPO: Serial In Parallel Out
2. Short AGND, DGND1, DGND2, and SUB directly under the IC and connect them to an analog ground.
3. Short ACOMIN and ACOMOUT directly under the IC.
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