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Si2433-KTR-REVF (MAIN ASSY : IC3101)
A
Y V.90, V.34, V.32 BIS ISO Modem with Integrated Grobal DAA
Pin Arrangement (Top view)Block Diagram
CLKIN/XTALIXTALO
12
CLKIN/XTALI124D5RAM
PLL
XTALO223DCD/D4CLKOUT 3Clocking
Data Bus
CLKOUT/A0322ESC/D3RXD 9
D6421C1ATXD 10
VD3.3520ISOBCTS 11
Serial
GND619VD3.3RTS 8Interface
VDA718GNDDCD 23
B
RTS/D7817VDBESC 22
RXD/RD916D2RI 15Microcontroller DAADSPInterface21 C1A
TXD/WR1015RI/D1INT 14
CS 11
CTS/CS1114INT/D013 AOUT
WR 10
RESET1213AOUT/INT
RD 9Parallel
Interface20 ISOB
A0 3
14-16, 22-24,
D0-D7
4, 8
RESET 12
Pin Function
C
No.Pin NameFunction
Clock Input/Crystal Oscillator Pin. This pin provides support for parallel-resonant, AT-cut crystals. XTALI
1CLKIN/XTALIalso acts as an input in the event that an external clock source is used in place of a crystal. A 4.9152 MHz
crystal or 4.9152 MHz clock is requred.
Crystal Oscillator Pin. This pin provides support for parallel-resonant AT-cut crystals. XTALO serves as the
2XTALO
output of the crystal amplifier.
3CLKOUT/A0Clock Output/Address Bit 0. Clock output in serial mode. Address Enable in parallel mode.
4D6Data Bit. Bidirectional parallel bus data bit 6 in parallel mode.
5, 19VD3.3Digital Supply Voltage. Provides the 3.3V digital supply voltage to the SI2433.
6, 18GNDGround. Connect to the system digital ground.
D
7, 17VDA, VDBDgital Rail. Pin provides additional power supply voltage to the SI2433.
Request-to-Send/Data Bit. Request-to-send (for flow control) in serial mode. Bidirectional parallel bus data
8RTS/D7
bit 7 in parallel mode.
Receive Data/Read Enable. Data output to DTE RXD pin in serial mode. Active low read enable pin in
9RXD/RD
parallel mode.
Transmit Data/Write Enable. Data input from DTE TXD pin in serial mode. Active low write enable pin in
10TXD/RW
parallel mode.
Clear-to-Send/Chip Select. Active low clear-to-send (for flow control) in serial mode. Active low chip select in
11CTS/CS
parallel mode.
12RESETReset Input. An active low input that is used to reset all control registers to a defined initialized state.
13AOUT/INTAnalog Output/Interrupt Output. Analog output in serial mode. Active low interrupt output in parallel mode.
E
Interrupt Output/Data Bit. Active low interrupt output in serial mode. Bidirectional parallel bus data bit 0 in
14INT/D0
parallel mode.
Ring Indicator/Data Bit. The RI on (active low) indicates the presence of an ON segment of a ring signal on
15RI/D1
the telephone line. Bidirectional parallel bus data bit 1 in parallel mode.
16D2Data Bit. Bidirectional parallel bus data bit 2 in parallel mode.
20ISOBIsolink Bias Voltage. This pin should be connected via the C3 capacitor.
21C1AIsolation Capacitor 1A. Connects to one side of the isolation capacitor C1.
22ESC/D3Escape/Data Bit. Hardware escape in serial mode. Bidirectional parallel bus data bit 3 in parallel mode.
Carrier Detect/Data Bit. Active low carrier detect in serial mode. Bidirectional parallel bus data bit 4 in
23DCD/D4
parallel mode.
F24D5Data Bit. Bidirectional parallel bus data bit 5 in parallel mmode.
88DVR-810H-S
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