4 terminal functions (continued) – Texas Instruments TCM4300 User Manual
Page 14
1–6
1.4
Terminal Functions (Continued)
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
MCDS
48
I
Microcontroller data strobe. MCDS is configured by the signals present on MTS0 and
MTS1.
MCLKIN
64
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.
MCRW
47
I
Microcontroller read/write. Microcontroller read/write operations are selected in
accordance with the signals present on MTS0 and MTS1.
MTS0
36
I
Microcontroller type select configuration-control inputs. The interface is controlled by
MTS (1:0) as follows:
00 – Intel
microcontroller interface characteristics
MTS1
37
I
10 – Mitsubishi
and Motorola
microcontroller 16-bit bus interface characteristics
01 – Motorola
microcontroller 8-bit bus characteristics
11 – Reserved
MWBDFINT
50
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.
OUT1
26
O
Output number 1. OUT1 provides a user-defined general purpose data or control signal.
PAEN
25
O
Power amplifier enable. PAEN can be used to enable the transmit power amplifier. This
signal is active high.
PWRCONT
16
O
Power amplifier (PA) power control. The PWRCONT DAC output can be used to control
the amount of power output from the PA.
RBIAS
99
I
Input for bias current-setting resistor. To achieve correct bias voltage, a 100-k
Ω
, 1%
tolerance resistor connected between RBIAS and AVSS is recommended.
REFCAP
100
I
Reference decoupling capacitor. For proper decoupling, It is recommended that a
3.3
µ
F capacitor in parallel with a 470-pF capacitor be connected between REFCAP and
ground.
RSINL
59
I
Reset input low. An active low applied to RSINL resets the TCM4300.
RSSI
2
I
Received signal strength indicator. RSSI samples received signal strength.
RSOUTH
60
O
Reset out high. An active high is output from RSOUTH for 10 ms after the TCM4300 is
powered up.
RSOUTL
61
O
Reset out low. An active low is output from RSOUTL for 10 ms after the TCM4300 is
powered up.
RXIN
8
I
Negative receive input. The in-phase differential negative baseband received signal is
applied to RXIN.
RXIP
9
I
Positive receive input. The in-phase differential positive baseband received signal is
applied to RXIP.
RXQN
5
I
Negative receive input. The quadrature negative baseband received signal is applied
to RXQN.
RXQP
6
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.