MC68302EH20C Freescale Semiconductor, MC68302EH20C Datasheet - Page 128

• 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

Communications Processor (CP)
RTS, CTS, and CD are multiplexed with the SCP. See 4.6 Serial Communication Port (SCP)
for more details on the SCP.
The other three physical interfaces, PCM, IDL, and GCI here are called multiplexed interfac-
es since they allow data from one, two, or all three SCCs to be time multiplexed together on
the same pins. Note that if a multiplexed mode is chosen, the first SCC to use that mode
must be SCC1 since the three multiplexed modes share pins with SCC1. After choosing a
multiplexed mode, the user may decide whether SCC2 and SCC3 should be part of the mul-
tiplexed interface or whether they should have their own set of NMSI pins (see Figure 4-4).
If SCC2 or SCC3 is part of the multiplexed interface, all NMSI2 and NMSI3 pins may be used
for other functions such as parallel I/O. If a multiplexed mode is chosen, the baud rate gen-
erator clock is output on the BRG or TCLK pin, depending on whether the NMSI mode or
multiplexed mode, respectively, was chosen for that SCC.
4-8
NMSI — Nonmultiplexed serial interface (also called the modem I/F).
BRG1
BRG3
BRG2
Figure 4-3. NMSI Physical Interface
MC68302
SCC1
SCC2
SCC3
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