TCM4300 Datasheet, PDF (11/69 Pages) Texas Instruments – Advanced RF Cellular Telephone Interface Circuit (ARCTIC )

1.4 Terminal Functions (Continued)
TERMINAL
NAME
NO.
DSPRW
69
DSPSTRBL
68
DVDD
DVSS
DWBDINT
35, 45, 63,
75, 90
34, 46, 65,
76, 91
78
FM
4
FMRXEN
95
IQRXEN
96
LCDCONTR
33
MCLKOUT
67
MCA0
40
MCA1
41
MCA2
42
MCA3
43
MCA4
44
MCCLK
62
MCCSH
39
MCCSL
38
MCD0
51
MCD1
52
MCD2
53
MCD3
54
MCD4
55
MCD5
56
MCD6
57
MCD7
58
† _{Z = high impedance}
I/O
I
I
—
—
O
I
O
O
O
O
I
O
I
I
I/O/Z
DESCRIPTION
DSP read/write. A high on DSPRW enables a read operation and a low enables
a write operation to the DSP.
DSP strobe low. The DSPSTRL (active low) is used in conjunction with DSPCSL
to enable read/write operations to the DSP.
Digital power supply. All supply terminals must be connected together.
Digital ground. All supply terminals must be connected together.
DSP wide-band data interrupt (active low). The DWBDINT output goes low to
indicate that the WBD demodulation circuits have traffic on them.
Frequency modulation. FM terminal is connected to the output of the FM
discriminator.
FM receive path enable. A high output from FMRXEN can be used to enable the
power for the receiver FM path.
In-phase and quadrature receive path enable. A high output on IQRXEN can be
used to enable the power for receiver I/Q path.
Liquid-crystal display (LCD) contrast. This LCDCONTR control DAC can be
used to control the amount of drive to the liquid crystal display.
Master clock out. MCLKOUT is a buffered version of MCLKIN.
Microcontroller 5-bit parallel address bus. MCA0 through MCA4 provide a 5-bit
bus to address the microcontroller. MCA4 is the MSB, and MCA0 is the LSB.
Microcontroller clock. MCCLK provides an adjustable frequency with 1.215 MHz
at powerup.
Microcontroller interface chip-select. A high at MCCSH in conjunction with a low
at MCCSL allows the microcontroller to read from or write to the TCM4300.
Microcontroller interface chip-select. A low at MCCSL in conjunction with a high
at the MCCSH allows the microcontroller to read from or write to the TCM4300.
Microcontroller 8-bit parallel data bus. MCD0 through MCD7 provides an 8-bit
parallel data bus to send/receive data to/from the microcontroller. MCD7 is the
MSB, and MCD0 is the LSB.
1–5