1998 Jul 22
2
853-2052 19059
Philips Semiconductors
Product specification
Advanced modem/audio analog
front-end
UCB1200
FEATURES
48 pin LQFP (SOT313) small body SMD package and low external component count results in minimal PCB space
requirement
12-bit sigma delta audio codec with programmable sample rate, input and output voltage levels, capable of connecting
directly to speaker and microphone, including digitally controlled mute, loopback and clip detection functions
14-bit sigma delta telecom codec with programmable sample rate, including digitally controlled input voltage level,
mute, loopback and clip detection functions. The telecom codec can be directly connected to a Data Access
Arrangement (DAA) and includes a built in sidetone suppression circuit
Complete 4 wire resistive touch screen interface circuit supporting position, pressure and plate resistance
measurements
10-bit successive approximation ADC with internal track and hold circuit and analog multiplexer for touch screen
read-out and monitoring of four external high voltage (7.5V) analog voltages
High speed, 4 wire serial interface data bus (SIB) for communication to the system controller
3.3V supply voltage and built in power saving modes make the 9397 750 04055 optimal for portable and battery
powered applications
Maximum operating current 25 mA
10 general purpose IO pins
APPLICATIONS
Handheld Personal Computers, Personal Intelligent Communicators, Personal Digital Assistants
Smart Mobile Phones
Screen/Web Phones
Internet Access Terminal
Modems
GENERAL DESCRIPTION
The UCB1200 is a single chip, integrated mixed signal audio and telecom codec. The single channel audio codec is
designed for direct connection of a microphone and a speaker. The built-in telecom codec can directly be connected to
a DAA and supports high speed modem protocols. The incorporated analog to digital converter and the touch screen
interface provides complete control and read-out of an 4 wire resistive touch screen. The 10 general purpose I/O pins
provide programmable inputs and/or outputs to the system.
The UCB1200 has a serial interface bus (SIB) intended to communicate to the system controller. Both the codec input
data and codec output data and the control register data are multiplexed on this SIB interface.
1998 Jul 22
4
Philips Semiconductors
Product specification
Advanced modem/audio analog front-end
UCB1200
PINNING
SYMBOL
PIN
DESCRIPTION
RESET
STATE
TYPE
(1)
IO7
1
general purpose I/O pins
input
I/O
C
IO8
2
general purpose I/O pins
input
I/O
C
IO9
3
general purpose I/O pins
input
I/O
C
ADCSYNC
4
ADC synchronization pulse input
-
I
C
V
SSD
5
digital ground
-
S
(2)
n.c
6
not connected
-
-
V
SSA2
7
analog speaker driver ground
-
S
SKPRN
8
negative speaker output
hi Z
O
A
SPRKP
9
positive speaker output
hi Z
O
A
V
DDA2
10
analog speaker driver supply
-
S
TOUTP
11
positive telecom codec output
hi Z
O
A
TOUTN
12
negative telecom codec output
hi Z
O
A
TEST
13
test mode protection
`0'
I
C
TINN
14
negative telecom codec input
hi Z
I
A
TINP
15
positive telecom codec input
hi Z
I
A
VREFBYP
16
external reference voltage input
hi Z
I/O
A
V
DDA1
17
analog supply
-
S
V
SSA1
18
analog ground
-
S
n.c
19
not connected
-
-
MICGND
20
microphone ground switch input
hi Z
I
A
MICP
21
microphone signal input
hi Z
I
A
AD3
22
analog voltage inputs
hi Z
I
A
AD2
23
analog voltage inputs
hi Z
I
A
AD1
24
analog voltage inputs
hi Z
I
A
AD0
25
analog voltage inputs
hi Z
I
A
V
SSA3
26
analog touch screen ground
-
S
TSPY
27
positive Y-plate touch screen
hi Z
I/O
A
TSMX
28
negative X-plate touch screen
hi Z
I/O
A
TSMY
29
negative Y-plate touch screen
hi Z
I/O
A
TSPX
30
positive X-plate touch screen
hi Z
I/O
A
n.c
31
not connected
-
-
V
DDD
32
digital supply
-
S
IO0
33
general purpose I/O pins
input
I/O
C
IO1
34
general purpose I/O pins
input
I/O
C
IO2
35
general purpose I/O pins
input
I/O
C
IO3
36
general purpose I/O pins
input
I/O
C
V
SSD
37
digital ground
-
S
RESET
38
asynchronous reset input
-
I
C
SIBSYNC
39
SIB synchronization input
-
I
C
1998 Jul 22
5
Philips Semiconductors
Product specification
Advanced modem/audio analog front-end
UCB1200
Notes
1. I/O
C
= CMOS bidirectional; I
D
= digital input; S = supply; O
A
= analog output; I
C
= CMOS input; I
A
= analog input;
I/O
A
= analog bidirectional; O
C
= CMOS output.
2. V
SSD
(pins 5 and 37) and V
SSA1
(pin 18) are connected internally within the UCB1200.
3. SKPRN/SPKRP (pins 8 and 9), TINN/TINP (pins 14 and 15) and TOUTP/TOUTN are differential pairs
4. TEST (pin 13) is connected to an internal pull-down resistor. This pin should be held LOW during normal operation
of the circuit.
5. The not connected pins (pins 6, 19, 31 and 44) are reserved for future applications and should be left floating.
6. SIBDOUT reset state is 1 until the SIB bus is running. SIBDOUT will be active once the SIB bus has started.
SIBDOUT
40
SIB data output
`1'
(6)
O
C
SIBCLK
41
SIB serial interface clock
-
I
C
SIBDIN
42
SIB data input
-
I
C
IRQOUT
43
interrupt output
`0'
O
C
n.c
44
not connected
-
-
IO4
45
general purpose I/O pins
input
I/O
C
IO5
46
general purpose I/O pins
input
I/O
C
IO6
47
general purpose I/O pins
input
I/O
C
V
DDD
48
digital supply
-
S
SYMBOL
PIN
DESCRIPTION
RESET
STATE
TYPE
(1)
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