Table 3-5. Multiplexing Sequence Of The Mx Function - Motorola MCP750HA Series Installation And Use Manual

Functional Description
3
TIME SLOT
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
3-20
module to synchronize with the MCP750HA board. MXDO is the time-
multiplexed output line from the main board and MXDI is the time-
multiplexed line from the transition module. A 16-to-1 multiplexing
scheme is used with 10 MHz bit rate. Sixteen Time Slots are defined and
allocated as follows:

Table 3-5. Multiplexing Sequence of the MX Function

MXDO
(From MCP750HA)
SIGNAL NAME
RTS3
DTR3
LLB3/MODSEL
RLB3
RTS4
DTR4
LLB4
RLB4
IDREQ
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
The MX function is used with PALs and some discrete devices. MXSYNC#
is clocked out using the falling edge of MXCLK, and MXDO by using the
rising edge of the MXCLK. MXDI is sampled at the rising edge of MXCLK
(the transition module synchronizes MXDI with MXCLK's rising edge). The
timing relationships among MXCLK, MXSYNC#, MXDO, and MXDI are
shown in Figure 3-4:
MXDI
(From TMCP700)
TIME SLOT SIGNAL NAME
0
1 DSR3/MID1
2
3 TM3/MID0
4
5
6 DSR4/MID3
7
8 TM4/MID2
9
10
11
12
13
14
15
Computer Group Literature Center Web Site
CTS3
DCD3
RI3
CTS4
DCD4
RI4
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved