CX86500 SCXV.xx Modem Data Sheet
3.1.2
CX86500 Modem 28-Pin TSSOP with Serial Interface Pin Assignments and Signal
Definitions
CX86500 Modem 28-pin TSSOP hardware interface signals are shown by major
interface in Figure 3-1, are shown by pin number in Figure 3-2, and are listed by pin
number in Table 3-1.
CX86500 Modem hardware interface signals are defined in Table 3-2.
Figure 3-1. CX86500 Modem 28-Pin TSSOP with Serial Interface Hardware Signals
28.224 OR 27.000 MHZ
CRYSTAL OR CLOCK OSCILLATOR
SERIAL HOST
INTERFACE
FREQUENCY SELECT
CIRCUIT
RESET CIRCUIT
+3.3V
240K
1
2
XTLI
XTLO
5
4
11
18
12
10
6
8
17
TXD#
RXD#
CTS#
RI#
DTR#
RTS#
RXCLK#
TXCLK#
RLSD#
PWRCLKP
PWRCLKN
DIB_DATAP
DIB_DATAN
26
27
20
21
DSPKOUT 28
CX86500 VDD_CORE 24
Modem
VDD
VDD
7
22
28-Pin TSSOP
Serial
GND
GND
9
25
15 SCLKSEL#
Interface
3 RESET#
23 LPO
RESERVED
13
14
RESERVED
RESERVED
RESERVED
16
19
DIGITAL ISOLATION
BARRIER (DIB)
SPEAKER CIRCUIT
+3.3V
102287_002
3-2
Conexant
102287F