DSCX-V34LF-066 View Datasheet(PDF) - Conexant Systems
Part Name
Description
MFG CO.
DSCX-V34LF-066
Conexant Systems
'DSCX-V34LF-066' PDF : 82 Pages View PDF
CX86500 SCXV.xx Modem Data Sheet
Table 3-6. CX86500 Modem 38-Pin TSSOP with Parallel Interface Hardware Signal Definitions (Continued)
Label
HCS#
HWT#
HRD#
HINT
Pin
18
20
21
19
HA0-HA2
HD0-HD7
6-8
12, 15-17,
22, 23, 27,
28
RESERVED
24
NC
2, 37
Note:
I/O Types: See Table 3-7.
I/O I/O Type
Signal Name/Description
Parallel Host Interface
I
Ipu/O2
Host Bus Chip Select. HCS# input low enables the MCU host bus
interface.
I
Ipu/O2
Host Bus Write. HWT# is an active low, write control input. When HCS#
is low, HWT# low allows the host to write data or control words into a
selected MCU register.
I
Ipu/O2
Host Bus Read. HRD# is an active low, read control input. When HCS#
is low, HRD# low allows the host to read status information or data from
a selected MCU register.
O
Ipd/O2
Host Bus Interrupt. HINT output is set high when the receiver error flag,
received data available, transmitter holding register empty, or modem
status interrupt is asserted. HINT is reset low upon the appropriate
interrupt service or master reset operation.
I
Ipu/O2
Host Bus Address Lines 0-2. During a host read or write operation with
HCS# low, HA0-HA2 select an internal MCU 16550A-compatible
register.
I/O Ippu/O2 Host Bus Data Lines 0-7. HD0-HD7 are three-state input/output lines
providing bidirectional communication between the host and the MCU.
Data, control words, and status information are transferred over HD0-
HD7.
Reserved
Reserved. Connect to digital ground (GND).
No Connect
No Internal Connection. Leave open.
102287F
Conexant
3-15
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