CX06833-4X View Datasheet(PDF) - Conexant Systems

Part Name

Description

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CX06833-4X

SMXXD Modem

Conexant Systems 

CX06833-3x/4x SMXXD Modem Data Sheet

Table 3-3. CX06833 Pin Signal Definitions (Continued)

Label

LPO

PC3

PC7

PD3

PE5

HCS# (PD4)

HRD# (PD6)

HWT# (PD5)

HINT (PB7)

HA0-HA2

(PD0-PD2)

HD0-HD7

(PC0-PC7)

BD2CLK

DV1TP

PHS2

TESTP

XXCLK

P_GP01

P_PA00

P_PA03

P_PA07

PA1

PA2

PA3

PA4

PA5

PA6

PB1

PB6

PD7

PE6

RESERVED

Pin

I/O I/O Type

Signal Name/Description

Not Used – Connect to +3.3V through Resistor

63

I I/O

Low Power Oscillator. Not used. Connect to +3.3V through 240 KΩ.

127

I

Ith/Ot2

Port PC3. Not used. Connect to +3.3V through 47K Ω.

133

I

Ith/Ot2

Port PC7. Not used. Connect to +3.3V through 47K Ω.

20

I

Ith/Ot2

Port PD7. Not used. Connect to +3.3V through 47K Ω.

30

I

Ith/Ot2

Port PE5. Not used. Connect to +3.3V through 47K Ω.

PARALLEL HOST BUS CONFIGURATION ONLY (PARIF = HIGH)

Parallel Host Interface

21

I It

Host Bus Chip Select. HCS# input low enables the MCU host bus interface.

23

I Ithpu

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.

22

I Ithpu

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.

112

O It/Ot8

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.

17-19

I Ithpd/Ot2 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.

123-124,

126-128,

130-133

I/O Ith/Ot8

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.

Not Used (In Parallel Host Interface Configuration)

65

O Itpu/Ot2 Not Used. Leave open.

114

I Itpu

Not Used. Leave open.

122

O Ot2

Not Used. Leave open.

113

I Itpu

Not Used. Leave open.

55

O It/Ot2

Not Used. Leave open.

58

I It

Port P_GP01. Leave open.

61

I/O Itpu/Ot2 Port P_PA00. Leave open.

60

O Ot2

Port P_PA03. Leave open.

57

O Ot2

Port P_PA07. Leave open.

34

I/O It/Ot2

Port PA1. Leave open.

35

I/O It/Ot2

Port PA2. Leave open.

36

I/O Itpu/Ot2 Port PA3. Leave open.

37

I/O Itpu/Ot2 Port PA4. Leave open.

38

I/O It/Ot2

Port PA5. Leave open.

39

I/O It/Ot2

Port PA6. Leave open.

104

I/O It/Ot2

Port PB1. Leave open.

110

I/O It/Ot2

Port PB6. Leave open.

53

I/O It/Ot2

Port PD7. Leave open.

31

I/O It/Ot2

Port PE6. Leave open.

98-101

Reserved. Connected to internal circuitry. Leave open.

102228A

Conexant

3-13

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