TCM4300 Datasheet, PDF (12/69 Pages) Texas Instruments – Advanced RF Cellular Telephone Interface Circuit (ARCTIC )

1.4 Terminal Functions (Continued)
TERMINAL
NAME
NO.
MCDS
48
MCLKIN
64
MCRW
47
MTS0
36
MTS1
37
MWBDFINT 50
OUT1
26
PAEN
25
PWRCONT 16
RBIAS
99
REFCAP
100
RSINL
59
RSSI
2
RSOUTH
60
RSOUTL
61
RXIN
8
RXIP
9
RXQN
5
RXQP
6
I/O
DESCRIPTION
I Microcontroller data strobe. MCDS is configured by the signals present on MTS0 and
MTS1.
I Master clock input. The MCLKIN frequency input requirement is 38.88 MHz ± 100 ppm.
A crystal can be connected between MCLKIN and XTAL to provide an oscillator circuit.
As an alternative, XTAL can be left open and an external TTL /CMOS-level clock signal
can be connected to MCLKIN.
I Microcontroller read/write. Microcontroller read/write operations are selected in
accordance with the signals present on MTS0 and MTS1.
I Microcontroller type select configuration-control inputs. The interface is controlled by
MTS (1:0) as follows:
00 – Intel microcontroller interface characteristics
I ^{10 – Mitsubishi and Motorola microcontroller 16-bit bus interface characteristics}
01 – Motorola microcontroller 8-bit bus characteristics
11 – Reserved
O Microcontroller interrupt request. A wide-band data-ready interrupt is output when the
WBD demodulator is in analog mode or when a frame interrupt is sent by the DSP in
digital mode. MWDBFINT can be active high or low according to the levels of the MTS0
and MTS1 signals.
O Output number 1. OUT1 provides a user-defined general purpose data or control signal.
O Power amplifier enable. PAEN can be used to enable the transmit power amplifier. This
signal is active high.
O Power amplifier (PA) power control. The PWRCONT DAC output can be used to control
the amount of power output from the PA.
I Input for bias current-setting resistor. To achieve correct bias voltage, a 100-kΩ, 1%
tolerance resistor connected between RBIAS and AVSS is recommended.
I Reference decoupling capacitor. For proper decoupling, It is recommended that a
3.3 µF capacitor in parallel with a 470-pF capacitor be connected between REFCAP and
ground.
I Reset input low. An active low applied to RSINL resets the TCM4300.
I Received signal strength indicator. RSSI samples received signal strength.
O Reset out high. An active high is output from RSOUTH for 10 ms after the TCM4300 is
powered up.
O Reset out low. An active low is output from RSOUTL for 10 ms after the TCM4300 is
powered up.
I Negative receive input. The in-phase differential negative baseband received signal is
applied to RXIN.
I Positive receive input. The in-phase differential positive baseband received signal is
applied to RXIP.
I Negative receive input. The quadrature negative baseband received signal is applied
to RXQN.
I Positive receive input. The quadrature differential positive baseband received signal is
applied to RXQP.
Intel is a trademark of Intel Corporation.
Mitsubishi is a trademark of Mitsubishi Inc.
Motorola is a trademark of Motorola, Inc.
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