Chapter 3 – SocketModem (MT5634SMI-34 & MT5634SMI-92)

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342C) 76

SCR – Scratch

The host programmer uses this register for temporary data storage.

DLL – Divisor Latch (LSByte)

This register contains low-order byte for the 16-bit clock divider. It is kept to maintain register set

compatibility with the 16C550A interface. However, it is not used for clock generation since MMM does not

require the generation of a real baud clock.

DLM – Divisor Latch (MSByte)

This register contains high-order byte for the 16-bit clock divider. It is kept to maintain register set

compatibility with the 16C550A interface. However, it is not used for clock generation, since MMM does not

require the generation of a real baud clock.

Programming the Baud Rate Generator Registers DLM (MSB) and DLL (LSB) provides a user capability for

selecting the desired final baud rate. The example in the Table below shows the selectable baud rates

available when using a 1.8432 MHz external clock input.

BAUD RATE GENERATOR PROGRAMMING TABLE

Baud

Rate

16 x Clock Divisor (Decimal) DLM Value (HEX) DLL Value (HEX)

110

300

600

1200

2400

4800

9600

19.2K

38.4K

57.6K

115.2K

1047

384

192

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 137 138

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Table des matières

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Introduction

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About the J8

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