Hynix semiconductor

3

Specifications of HMS91C7432

The HMS91C7432 TCP/IP communication controller is manufactured in advance CMOS

process.

The HMS91C7432 implement complete TCP/IP protocol suite includes PPP; IP; ICMP;TCP;

UDP; DNS; SMTP; POP3 protocol and additionally a general MODEM driver.

The HMS91C7432 is built-in with 96Kb SRAM (12K x 8) for communication and buffering, A full

duplex UART as DTE for ease of serial modem connection.

The HMS91C7432 has an 8 bits Data/Command port and 4 control pins to facilitate control and

communication between the Host MCU and the modem. There are only 20 simple commands,

each of which is a single byte long, to establish and to complete the whole internet

communication. 45 respond codes for the Host MCU to monitor the communication status.

Extremely low external component count. Very low power consumption.

Features :

y

Implement TCP/IP protocol suit.

y

SMTP for sending email

y

POP3 for receiving email

y

PPP for dialup network log on

and hand shaking.

y

DNS protocol to resolve IP

address from URL

y

Full static operation

y

Full Duplex 56K/115Kbps UART

port for modem DTE connection.

y

Speed range up to 22.118MHz

y

8 bits Bi-directional Data/Command bus.

y

Modem driver included

y

Power control modes

9

Active mode

9

Power-down mode

y

Dissipating Current

ß

Active 25mA

ß

Power-down 10uA max.

y

20 single byte easy commands

y

45 respond codes

y

Package type 20-SOP

y

Operating voltage

3.3V +/- 10%

Dissipating Current

Active mode

25 mA

Power down mode

10uA max.

Oscillation Frequency

11.0592 Mhz

Operating Temperature

-40 to +85°C

Storage Temperature

-65 to +150°C

D0

D1

D2

D3

D4

D5

D6

D7

Test

VCC

RXD

TXD

Reset

Strobe

WR

INT

Wait

Xtal 2

Xtal 1

Vss

HMS91C7432

SOP 20

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11