cx20493-35/app Conexant Systems, Inc., cx20493-35/app Datasheet - Page 41

• Manufacturer Part Number: cx20493-35/app
• Description: With Cx20493 Smartdaa?
• Manufacturer: Conexant Systems, Inc.

Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) (Continued)
102247B
DSPKOUT
PWRCLKP
PWRCLKN
DIB_DATAP
DIB_DATAN
A0-A9,
A10-A15,
A16 (PB0),
A17 (PB4),
A18 (PB5)
D0-D7
READ#
WRITE#
ROMSEL# (PB2)
RAMSEL# (PB3)
RESERVED (PB1)
EXT_RES# (PB6)
IASLEEP (P_PF05)
M_CLK (P_PB00)
SR2CLK (P_PGP05)
SA2CLK (P_PX05)
SR3OUT
SR3IN (P_PX01)
SR2IO (P_PX06)
CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet
Label
98
96
97
93
94
71-77, 79-81,
84, 86-89, 91,
99,
105,
106
62-67, 69-70
119
118
102
104
101
107
50
37
92
38
35
36
39
Pin
O
O
O
I/O
I/0
O,
O,
O,
O,
O
I/O
O
O
O
O
O
O
O
O
I
I
O
I
O
I/O
It/Ot2
Odpc
Odpc
Idd/Odd
Idd/Odd
It/Ot8,
It/Ot8,
It/Ot2,
It/Ot2,
It/Ot2
Ith/Ot2
It/Ot2
It/Ot2
Ot2
It/Ot2
It/Ot2
It/Ot2
Ot2
It/Ot2
Itpu/Ot2
Itpu/Ot2
Ot2
Itk/Ot2
It/Ot2
I/O Type
External Bus Interface
CX20442 VC Interface
Speaker Interface
Conexant
DIB Interface
Modem Speaker Digital Output. The DSPKOUT digital output
reflects the received analog input signal digitized to TTL high or low
level by an internal comparator.
Clock and Power Positive. Provides clock and power to the LSD.
Connect to DIB transformer primary winding non-dotted terminal.
Clock and Power Negative. Provides clock and power to the LSD.
Connect to DIB transformer primary winding dotted terminal.
Data Positive. Transfers data, control, and status information
between the Smart Modem and the LSD. Connect to LSD through
DIB data positive channel components.
Data Negative. Transfers data, control, and status information
between the Smart Modem and the LSD. Connect to LSD through
DIB data negative channel components.
Address Lines 0-18. A0-A18 are the address output lines used to
access external memory; up to 4 Mb (512 KB) ROM/flash ROM
using A0-A18 and up to 1 Mb (128 KB) RAM using A0-A16.
The 256 KB base modem ROM code is located in the 0-256 KB
address range.
Data Line 0-7. D0-D7 are the bidirectional external memory bus
data lines.
Read Enable. READ# output low enables data transfer from the
selected device to the D0-D7 lines.
Write Enable. WRITE# output low enables data transfer from the
D0-D7 lines to the selected device.
ROM Select. ROMSEL# (PB2, ES3) output low selects the external
ROM/flash ROM.
RAM Select. RAMSEL# (PB3, ES2) output low selects the external
RAM.
Reserved. PB1 (ES4) is used internally. Leave open.
External Device Reset. Active low reset for external devices.
Leave open if not used.
Modem Sleep. Connect to VC SLEEP pin.
Master Clock Output. Connect to VC M_CLKIN pin.
Voice Serial Clock input. Connect to VC M_SCK pin.
Voice Serial Frame Sync Input. Connect to VC M_STROBE pin.
Voice Serial Transmit Data Output. Connect to VC M_TXSIN pin.
Voice Serial Receive Data Input. Connect to VC M_RXOUT pin.
Voice Control Output. Connect to VC M_CNTRLSIN pin.
Signal Name/Description
3-9