MC68302EH20C Freescale Semiconductor, MC68302EH20C Datasheet - Page 398

• Manufacturer Part Number: MC68302EH20C
• Description: IC MPU MULTI-PROTOCOL 132-PQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68302EH20C

• Processor Type: M683xx 32-Bit
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-MQFP, 132-PQFP
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 20MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 132
• Package Type: PQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Compliant

MC68302 Applications
The other three physical interfaces, PCM highway, IDL, and GCI, are called multiplexed in-
terfaces since they allow data from one, two, or all three SCCs to be time multiplexed to-
gether on the same pins. If a multiplexed interface is chosen, the first SCC to use that
interface must be SCC1, since the three multiplexed modes share pins with SCC1 (see Fig-
ure D-22). After choosing a multiplexed mode, you can decide independently whether SCC2
and SCC3 should be part of the multiplexed interface or whether they should have their own
set of NMSI pins.
If you are working in ISDN, transparent mode can be quite useful in sending and receiving
transparent data over the 2B + D interface. IDL and GCI allow the SCCs to transmit and re-
ceive data on the two 64 kbps B channels and on the one 16 kbps D channel in basic rate
ISDN. If you are not interfacing to a 2B + D ISDN environment, you can probably rule out
using IDL and GCI.
D-48
NMSI — Nonmultiplexed serial interface (also called the modem I/F).
BRG1
BRG2
BRG3
Figure D-21. NMSI Pin Definitions
MC68302
SCC1
SCC3
SCC2
BRG
BRG
BRG
MC68302 USER’S MANUAL
NMSI3 (same as above)
NMSI2 (same as above)
TCLK
TXD
NMSI1
RTS
CTS
RCLK
RXD
CD
(TX DATA READY)
(GATES RECEIVER)
(GATES TRANSMITTER)
MOTOROLA