Philips UMA1002T Datasheet

INTEGRATED CIRCUITS

DATA SH EET

UMA1002

Data processor for cellular radio (DPROC2)

Product speciﬁcation Supersedes data of 1996 Sep 13 File under Integrated Circuits, IC17

1997 Jan 28

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio (DPROC2)

FEATURES

• Single chip solution to all the data handling and supervisory functions

• Configuration to both AMPS and TACS

• Additional JTACS option

• I2C-bus serial control

• All analog interface and filtering functions fully

implemented on chip

• Error handling in hardware reduces software requirements

• Robust SAT decoding and transponding circuitry

• Low current consumption by on-chip power-down

modes

• Reduced system current consumption by new integrated power-saving features

– Majority voting includes more intelligence – On-chip control filler word filter – BCH error filter – Possibility to program ESCC bits

• Small physical size: SO28 or LQFP32

• External peripheral component count reduced

– On-chip selectable clock divider – Integrated pull-up resistor at TXLINE

• Simplified reset and abort software routines possible

• The SO28 version is fully compatible with UMA1000LT

and UMF1000T.

UMA1002

GENERAL DESCRIPTION

The UMA1002 is a low power CMOS LSI device incorporating the data transceiving, data processing, and SAT functions (including on-chip filtering) for an AMPS or TACS hand-held portable cellular radio telephone.

In this data sheet, the UMA1002 is often referred to by the descriptive term ‘DPROC2’.

QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

amb

ORDERING INFORMATION

TYPE

NUMBER

UMA1002T SO28 plastic small outline package; 28 leads; body width 7.5 mm SOT136-1

UMA1002H LQFP32 plastic low proﬁle quad ﬂat package; 32 leads; body 7 × 7 × 1.4 mm SOT358-1

1997 Jan 28 2

supply voltage 2.7 3.0 5.5 V supply current normal operation with external clock − 1.3 1.8 mA operating ambient temperature −30 − +70 °C

PACKAGE

NAME DESCRIPTION VERSION

1997 Jan 28 3

ook, full pagewidth

BLOCK DIAGRAM

(DPROC2)

DDAVDDD INVRX RECDATA MVO

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio

DEMODD

AGND

DATA

RESET

ANTI-

ALIASING

(31)

FILTER

UMA1002

2 (30)

(32)

RESET, CLOCK AND

POWER-DOWN

(2)

GENERATOR

(3)10 (8)7 (4)28 (27)(28)

COMPARATOR 1

DATA

RECOVERY

SAT

FILTER

CLOCK FILTER

12 (10)(20)

13 (11)

CLKOUTCLKINCLKSEL

INTERPOLATOR

BIAS

GENERATOR

OUTPUT

FILTER

TEST

LOGIC

9 (7)22(22)

TST TSCAN

COMPARATOR 2

GATED D/A

1 (29)

SSA

SAT

RECOVERY

SAT

REGENERATION

GENERATOR

14 (12)

SSD

SYNCRONIZATION

AND VOTING

DOTTING

DETECTOR

SAT

DETERMINATION

MANCHESTER

AND BCH

ENCODING

(6) 21 (21)

ERROR

CORECTION

ARBITRATION

LOGIC

TRANSMIT

BUFFER

I C

INTERFACE

23 (23)

A0INVTXJTACSV

8 (5)

27 (26)

19 (17)

5 (1)

20 (19)

11 (9)

18 (16) 17 (15)

15 (13)

25 (25)

24 (24)

RXLINE RXCLK

BUSY/VSAT

RACTRL

TXCTRL

TACTRL TXCLK

TXHOLD TXLINE

SCL

SDA

MBD827

Pins in parenthesis apply to UMA1002H in LQFP32.

UMA1002

Fig.1 Block diagram.

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio

UMA1002

(DPROC2)

PINNING

SYMBOL

SSA

AGND 2 30 Internally generated analog signal ground. V oltage level =

DEMODD 3 31 DEMODD inputs analog data and SAT signals from the RF demodulator. This pin

DA TA 4 32 Data is an analog output which provides the Manchester encoded and filtered data

RACTRL 5 1 Received audio control output. Open-drain output used to blank the audio path to

RESET 6 2 Master reset input resetting all internal ﬂip-ﬂops to the speciﬁed state. This input

INVRX 7 4 This input inverts the sense of received data stream, which allows RF

RXLINE 8 5 Received data signal output to the system controller. TST 9 7 Test input pin (note 1). RECDATA 10 8 Output of the recovered digital data signal (note 1). TACTRL 11 9 Transmitter audio control output. This open-drain output is used to blank the audio

CLKIN 12 10 1.2 MHz or 9.6 MHz external master clock input. This input signal should be

CLKOUT 13 11 Output of 1.2 MHz clock signal (for APROC) derived from CLKIN. V

SSD

TXLINE 15 13 Open-drain bidirectional data line to the system controller (internal 100 kΩ pull-up). n.c. 16 14 Not connected. TXHOLD 17 15 This input holds off transmission of data when set to HIGH. TXCLK 18 16 Transmitted data clock input from the system controller. BUSY/VSA T 19 17 Output indicating the status of the RECC by providing output information based on

DESCRIPTION

SO28 LQFP32

1 29 Negative analog supply (0 V). To be connected low-ohmic to V

SSD

⁄2V

. This pin should

DDA

be connected to a blocking capacitor, no DC load allowed.

should normally be AC-coupled. See Chapter “AC characteristics”.

signal, SAT and signalling tone. This signal should normally be AC-coupled into the Audio/Data summer. See Chapter “AC characteristics”.

the earpiece when a sequence of dotting followed by a synchronization word or 2 synchronization words separated by 77 bits is detected. RACTRL and TACTRL functions can be combined using one line. Output level LOW means audio muted.

has no inﬂuence on analog parts, but must be controlled by an active HIGH microcontroller port.

demodulators with high or low local oscillators to be used. The AMPS and TACS speciﬁcations deﬁne NRZ encoded logic 1 as a LOW-to-HIGH transition in the centre of a data bit period. The polarity of the demodulated data stream into DPROC2 depends on the receiver local oscillator. Input LOW means data normal.

path and enable the data path to the modulator during data bursts on the RVC. Output level LOW means audio muted.

accurate to 100 × 10

−6

and have a worst case 60 : 40 mark-space ratio.

14 12 Negative digital supply (0 V), internally connected to substrate. To be connected

low-ohmic to V

SSA

a majority decision on the last 3 consecutive Busy/Idle bits (FVC = logic 0). Output level LOW means channel idle. Indicating the result of the comparison of the measured SA T and the expected SAT colour-code bits (I

C-bus register) in the voice channel mode (FVC = logic 1 and ENSM = logic 1). Output level LOW means incoming SAT not equal to expected SAT.

1997 Jan 28 4

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio

UMA1002

(DPROC2)

SYMBOL

TXCTRL 20 19 Transmitter control open-drain output used to disable the transmitter during an

INVTX 21 21 This input inverts the sense of transmitted data stream, which allows RF

TSCAN 22 22 Test switch input, only enabled if TST = logic 1, but should have a deﬁned state. A0 23 23 Input to select the least signiﬁcant bit of the I SDA 24 24 Serial data input/output (I SCL 25 25 Serial clock input (I n.c. 26 18 Not connected. RXCLK 27 26 Received data clock input from the system controller. V

DDD

DDA

MVO − 3 Majority voting output indicating that on FOCC the ﬁrst 3 received words do not

JTACS − 6 Digital input signal for JTACS, input HIGH means that data is routed from TXLINE

CLKSEL − 20 Input switch for internal divide-by-8 or divide-by-1 divider between CLKIN and

SO28 LQFP32

RECC access failure. Output level LOW means RF disabled.

modulators with high or low local oscillators to be used. The AMPS and TACS speciﬁcations deﬁne NRZ encoded logic 1 as a LOW-to-HIGH transition in the centre of a data bit period. The polarity of the modulated data stream depends on the transmitter local oscillator. Input LOW means data inverted.

C-bus).

28 27 Digital supply voltage (+3 V).

− 28 Analog supply voltage (+3 V).

differ from each other and thus the majority decision over 5 words can already be carried out. Because of the required speed, indication is at this pin (and not via the

C-bus) which can be monitored by the system controller. Output LOW means the

receiver can be switched off.

directly without processing to gated D/A converter (if enabled by STEN bit).

CLKOUT (internal pull-down → divide-by-1 is default if not bonded out in SO28 package).

C-bus).

DESCRIPTION

C-bus address.

Note

1. Must not be connected in existing applications.

1997 Jan 28 5

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio (DPROC2)

handbook, halfpage

SSA

AGND

DEMODD

DATA

RACTRL

RESET

INVRX

RXLINE

TST

RECDATA

TACTRL

CLKIN

CLKOUT

SSD

1 2 3 4 5 6 7 8

9 10 11 12 13

UMA1002T

MBD828

DDD

RXCLK n.c.

26 25

SCL

SDA

TSCAN

INVTX

TXCTRL

BUSY/VSAT

TXCLK

TXHOLD

n.c.

1514

TXLINE

UMA1002

handbook, full pagewidth

Fig.2 Pin configuration for SO28, SOT136-1.

SSA

DDA

SSD

DDD

n.c.

TXLINE

RACTRL

RESET

MVO

INVRX

RXLINE

JTACS

TST

RECDATA

DATA

AGNDVV

DEMODD

1 2

3 4 5 6 7 8

CLKIN

TACTRL

UMA1002H

CLKOUT

RXCLK

SCL

TXCLK

TXHOLD

SDA

TSCAN INVTX

21 20

CLKSEL

TXCTRL

n.c. BUSY/VSAT

MBD829

Fig.3 Pin configuration for LQFP32, SOT358-1.

1997 Jan 28 6

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio (DPROC2)

FUNCTIONAL DESCRIPTION General

The UMA1002 (DPROC2) is a single-chip CMOS device which handles the data and supervisory functions of an AMPS or TACS subscriber set.

These functions are:

• Data reception and transmission

• Control and voice channel exchanges

• Error detection, correction, decoding and encoding

• Supervisory Audio Tone decoding and transponding

• Signalling Tone generation.

In an AMPS or TACS cellular telephone system, mobile stations communicate with a base over full duplex RF channels. A call is initially set up using one out of a number of dedicated control channels. This establishes a duplex voice connection using a pair of voice channels. Any further transmission of control data occurs on these voice channels by briefly blanking the audio and simultaneously transmitting the data. The data burst is brief and barely noticeable by the user. A data rate of 10 kbits/s is used in the AMPS system and 8 kbits/s in TACS. The signalling formats for both Forward Channels (base to mobile) and Reverse Channels (mobile to base) are shown in Fig.14.

A function known as Supervisory Audio Tone (SAT), a set of 3 audio tones (5970, 6000 and 6030 Hz), is used to indicate the presence of the mobile on the designated voice channel. This signal, which is analogous to the On-Hook signal on land lines, is sent out to the mobile by the base station on the Forward Voice Channel. The signal must be accurately recovered and transponded back to the base station to complete the ‘loop’. At the base station this signal is used to ascertain the overall quality of the communication link.

Another voice channel associated signal is Signalling Tone (ST). This tone (8 kHz TACS, 10 kHz AMPS) is generated by the mobile and is sent in conjunction with SAT on the Reverse Voice Channel to serve as an acknowledgement signal to a number of system orders.

The key requirements of a hand-held portable cellular set are:

• Small physical size

• Minimum number of interconnections (serial bus)

• Low power consumption

• Low cost.

UMA1002

The DPROC2 is a member of our Cellular Radio chip set, based on the I A cellular radio system schematic using the chip set is shown in Fig.11.

DPROC2 power-saving features

To support current saving in the application, DPROC2 has three different modes of circuit operation implemented. They are decoded by the I activity on the data transfer link (TXCLK and TXLINE). In power-down mode the relevant digital circuits have the clock disabled, the analog circuits have the bias currents and the switched capacitor clock switched off.

• Normal mode: all circuit parts are operating (e.g. on Voice channels)

• Power-down mode 1: the SAT path is in power-down (e.g. during access of the RECC)

• Power-down mode 2: the SAT path and the total data transmit path are in power-down (e.g. for Idle state, DPROC2 operating only on FOCC).

System power-saving features

Besides the above mentioned power-down modes DPROC2 also includes features to reduce system current (e.g. switching off parts of the receiver, and put the system controller into Idle mode for longer periods of time). All these features are controlled by the I explanation of the following features refer to the Section “I2C-bus serial data link (SDA; SCL)” sub-section “I2C-bus registers”.

AJORITY VOTING (ONLY IN LQFP32)

Majority voting includes more intelligence. This feature is enabled in FOCC with I2C-bus bit MAJ = logic 1. If 3 consecutive identical words have been received it is signalled via pin MVO. Therefore during the last 2 frame words the receiver could be switched off to save system current consumption.

ONTROL FILLER WORDS FILTER

System current can be further reduced by an on-chip control filler words filter in FOCC, which enables the detection of consecutive identical control filler words. If consecutive control filler words are identical (i.e. DCC, CMAC and WFOM) they will not be passed on to the microcontroller. Consequently the system controller can remain in power-saving mode.

C-bus, which meets these requirements.

C-bus register bit FVC and by

C-bus. For further

1997 Jan 28 7

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio (DPROC2)

PROGRAMMING OF ESCC BITS There is a possibility to program the expected ESCC bits,

so that DPROC2 can compare expected and received SAT and signal any inconsistency to the system controller via BUSY/VSAT pin. Consequently there is no need to read the measured SAT periodically via the I2C-bus.

BCH

ERROR FILTER

If this feature is enabled, DPROC2 will not pass on to the microcontroller words with BCH errors. Consequently the microcontroller can remain in power-saving mode. This feature in combination with the control filler feature is defined in Table 8.

ELECTABLE CLOCK DIVIDER (ONLY IN LQFP32)

An on-chip selectable divide-by-8 clock divider reduces external peripheral component count.

UMA1002

Power-up state and master reset (RESET)

RESET should be HIGH as soon as power supply is available.

DPROC2 will not respond reliably to any inputs (including RESET) until 100 µs after the power supply has settled within the specified tolerance. The analog sections of the device will have stabilized within 5 ms. No on-chip power-on reset is provided, therefore before the device can enter normal operation RESET must be held HIGH.

RESET is an active HIGH master reset input, with a minimum active pulse width of 4 µs which may be used to reset the total logic within DPROC2 to a predefined state as illustrated in Tables 1 and 2. It is preferably only used during power-up, during normal operation it is recommended to use the fully synchronous reset signals derived from the I2C-bus bits FVC, STS and TXRST (see Table 4). To ensure correct operation TXCLK must be held HIGH during RESET operation.

Table 1 Predeﬁned state of the digital output pins

OUTPUT STATE

RXLINE HIGH TXCTRL high-impedance (HIGH) TACTRL high-impedance (HIGH) RACTRL high-impedance (HIGH) BUSY/VSAT HIGH TXLINE HIGH (by 100 kΩ internal pull-up resistor) RECDATA LOW MVO HIGH SDA high-impedance (HIGH)

Table 2 Predeﬁned state of the I

76543210

Status (read) LOW LOW LOW HIGH LOW LOW HIGH HIGH Control 1 (write) LOW LOW LOW LOW LOW LOW LOW LOW Control 2 (write) LOW LOW LOW LOW LOW LOW LOW LOW

C-bus registers

BIT

1997 Jan 28 8

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio (DPROC2)

I2C-bus serial data link (SDA; SCL)

SDA is the bidirectional data line, SCL is the clock input from an I2C-bus master. These constitute a typical I2C link and conform to standard I2C-bus characteristics. A detailed description of the I2C-bus specification, with applications, is given in the brochure

how to use it”.

This brochure may be ordered using the

code 9398 393 40011.

• Data rate up to 100 kbits/s.

LAVE ADDRESS SELECT (A0)

Selection of the device slave address is achieved by connecting A0 to either VSS or V defined in accordance with the I2C-bus specifications as shown in Fig.4.

handbook, halfpage

“The I2C-bus and

. The slave address is

DDD

(1)

R/W11011XA0

MBD831

UMA1002

I2C-BUS REGISTERS The I2C-bus register block resides internally within the

I2C-bus interface block and contains various items of status and control information which are transferred to and from DPROC2 via the I2C-bus. The block is organized into three 8-bit registers:

• Status register which contains read only items

• Control registers 1 and 2 which contain write only items.

(1) X = don’t care.

Fig.4 Device slave address.

Table 3 I2C-bus register map

BIT

76543210

Status (read) −−WSYNC BUSY TXABRT TXIP MSCC1 MSCC0 Control 1 (write) BUFEN SERV STS TXRST ABREN FVC STEN SATEN Control 2 (write) MAJ MR1 MR0 DBCH DCFM ENSM ESCC1 ESCC0

1997 Jan 28 9

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio (DPROC2)

handbook, full pagewidth

(a) Read from DPROC2 status register. (b) Write to DPROC2 control register 1. (c) Write to all DPROC2 control registers. Where:

S = START condition W = read/write bit (logic 0 = write) R = read/write bit (logic 1 = read) A = acknowledge bit P = STOP condition DPROC ADR = slave address of DPROC2.

DPROC ADRS R A STATUS

(a)

WA APDPROC ADRS

CONTROL 1

(b)

WA ADPROC ADRS CONTROL 2 A P

CONTROL 1

MBD832

(c)

UMA1002

Fig.5 I2C-bus data format.

1997 Jan 28 10

Philips Semiconductors Product speciﬁcation

Data processor for cellular radio

UMA1002

(DPROC2)

Table 4 Description of I2C-bus register map

BITS

Control Register 1

BUFEN 0 1.2 MHz signal not available at pin CLKOUT

SERV 0 serving system data stream B selected

(1)

STS

TXRST 1 terminates a message being transmitted on the reverse channel; monostable

ABREN 1 DPROC2 has permission to abort data transmission and disable RF on the RECC

(2)

FVC

STEN 0 disables output of signalling tone to pin DATA

SATEN 0 disables output of SAT transponded signal to pin DATA

LOGIC LEVEL DESCRIPTION

1 1.2 MHz signal is available at pin CLKOUT

1 serving system data stream A selected 0 TACS selected 1 AMPS selected

signal causing a reset of the message transmission circuitry and resets the I2C-bus bits TXABRT, TXIP and clears the transmit buffer

following the detection of a channel access attempt collision 0 no permission for above operations 0 control channel format selected 1 voice channel format selected

1 enables output of signalling tone to pin DATA if FVC = logic 1

1 enables output of SAT transponded signal to pin DATA if FVC = logic 1

Control Register 2

MAJ 0 majority voting procedure on FOCC using all 5 frame words, MVO output is always

HIGH 1 majority voting procedure on FOCC using the ﬁrst 3 frame words, if they are all

identical the MVO pin goes LOW (see Fig.6)

MR0, MR1 see Table 5 determines set-up time of MVO signal with respect to beginning of the next dotting

(see Fig.6)

DBCH see Table 8 BCH error ﬁlter DCFM see Table 8 control ﬁller message ﬁlter ENSM 0 enable SAT monitoring; ESCC bits are not used

1 enable SAT monitoring; ESCC bits are used for following function

ESCC0, ESCC1

Status Register

WSYNC 0 DPROC2 has not acquired frame synchronization in accordance with FOCC

see Table 6 expected SAT colour code bits; the incoming SAT is compared to these bits, the

result (expected or not expected SAT frequency) is given out by the BUSY/VSAT

pin (when FVC = logic 1), which prevents periodical reading from the I

status register

format 1 DPROC2 has acquired frame synchronization in accordance with FOCC format

C-bus

1997 Jan 28 11

+ 25 hidden pages