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

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

3.1.3
3.1.3.1
3.1.4
102247B
CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet
Parallel Interface Configuration Only (PARIF = High)
CX81801 Modem Interface Signals
A 16550A UART-compatible parallel host bus interface is selected when the PARIF
input is high.
Parallel Host Bus Interface
The parallel host interface signals are:
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•
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CX81801 Modem 128-pin LQFP hardware interface signals for parallel interface 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. The Smart Modem hardware interface signals for
parallel interface are defined in Table 3-2.
CX81801 Modem 128-pin LQFP hardware interface signals for serial interface are shown
by major interface in Figure 3-3, are shown by pin number in Figure 3-4, and are listed
by pin number in Table 3-3. CX81801 Modem hardware interface signals for serial
interface are defined in Table 3-4.
I/O types are defined in Table 3-5.
DC electrical characteristics are listed in Table 3-6.
Host Reset control input line (RESET#)
Host Chip Select control input (HCS#)
Host Read control input (HRD#) and Host Write control input (HWT#)
Host Interrupt output line (HINT)
Three Host Address input lines (HA0-HA2)
Eight Host Data lines (HD0-HD7)
Conexant
3-3