MSC8144ADS Freescale, MSC8144ADS Datasheet - Page 31

• Manufacturer Part Number: MSC8144ADS
• Manufacturer: Freescale

Specifications of MSC8144ADS

• Lead Free Status / RoHS Status: Compliant

5.6 RS-232 on UART
Two RS-232 serial interfaces are connected to the UART ports of the MPC8560 and the
MSC8144. The RS-232 connections assist in user applications and, further, provide convenient
communication channels for both the terminal and host computer. Using a lone 3.3 V single
power supply with disable mode, the MAXIM MAX3221 transceiver internally generates
RS-232 levels during which receive buffers are tri-stated. When asserting (low) the RS-232 EN
bit in BCSR0[3], the MSC8144 UART transceiver is enabled. When the bit is cleared, the
receiver outputs are tri-stated and the transceiver is disabled. The MPC8560 RS-232 transceiver
is always enabled. Dual stacked 9-pin female D-Type RS-232 connectors are configured to
connect directly (via a flat cable) to a standard IBM-PC-like RS-232 connector. Note the figure,
Figure 5-5 shows the RS-232 connector pinouts. Directions I and O are relative to the on board
processors (for example, I means input to the ADS). The lower connector belongs to MSC8144
and the upper to the MPC8560 UART. The RS-232 connector is intended for null-modem
connectivity.
Freescale Semiconductor
TLV320AIC22CPT
DS3/E3 Framer
E1/T1 Framers
2xDS2651
XRT79L1
Device
Codec
Two ch. 16-bit on
GND
RXD
DSR
DTR
TXD
AD0,AD1 = 0
TS 0–3 with
Stacked DB-9
Table 5-2. TDM Peripherals Configuration Modes
TDM0
Bit 0
—
1
2
3
4
5
Figure 5-5.
MSC8144/MPC8560 Unmultiplexed TDM Ports
6
7
8
9
Data:(FR1+FR2)
DTR
CTS
RTS
NC
MSC8144ADS MSC8144, Rev. 0
TDM1
Bit 1
—
RS-232 Serial Port Connectors
• DTR = Data Terminal Ready (O) NC
• TXD = Transmit Data (O)
• RXD = Receive Data (I)
• DSR = Data Set Ready (I) NC
• CTS = Clear To Send (I) NC
• RTS = Request To Send (O) NC
SIG(FR1+FR2)
TDM2
Bit 2
—
TDM3
Bit 3
—
—
Nibble-Parallel Mode
for DS3/E3
CTS independent for
receive/transmit for
MCS8144 TDM
MSC8144 TDM
Mode
CODEC Master Mode
TDM0 works in
clk&sync common
mode
Link A,B are in Shared
Comment
RS-232 on UART
5-7