Specifications

PART 3 – Analog SocketModems Chapter 10 – SocketModem (MT5692SMI)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342P) 170
SCR – Scratch Register
(Addr = 7)
The Scratchpad Register is a read-write register at location 7. This register is not used by the modem and can
be used by the host for temporary storage.
Divisor Registers
(Addr = 0 and 1, DLAB = 1)
The Divisor Latch LS (least significant byte) and Divisor Latch MS (most significant byte) are two read-write
registers at locations 0 and 1 when DLAB = 1, respectively.
The baud rate is selected by loading each divisor latch with the appropriate hex value.
Programmable values corresponding to the desired baud rate are listed in Table on following page.
Programmable Baud Rates
Divisor Latch (Hex)
Divisor (Decimal)
Baud Rate
MS
LS
06
00
1536
75
04
17
1047
110
03
00
768
150
01
80
384
300
00
C0
192
600
00
60
96
1200
00
30
48
2400
00
18
24
4800
00
0C
12
9600
00
06
6
19200
00
04
4
28800
00
03
3
38400
00
02
2
57600
00
01
1
115600
00
00
NA
230400