MC68302EH16C Freescale Semiconductor, MC68302EH16C Datasheet - Page 347

• Manufacturer Part Number: MC68302EH16C
• Description: IC MPU MULTI-PROTOCOL 132-PQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68302EH16C

• Processor Type: M683xx 32-Bit
• Speed: 16MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-MQFP, 132-PQFP
• Controller Family/series: 68K
• Core Size: 32 Bit
• Ram Memory Size: 1152Byte
• Cpu Speed: 16MHz
• No. Of Timers: 3
• Embedded Interface Type: SCP, TDM
• Digital Ic Case Style: PQFP
• Rohs Compliant: Yes
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 16MHz
• 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: RoHS Compliant part Electrostatic Device

APPENDIX C
RISC MICROCODE FROM RAM
The MC68302 RISC processor has an option to execute microcode from the 576-byte user
RAM in the on-chip dual-port RAM. In this mode, the 576-byte user RAM cannot be access-
ed by the M68000 core or other M68000 bus masters. Also in this mode, port A pins are op-
tionally available to the RlSC processor as well as the M68000 core. Figure C-1 shows these
resulting changes.
Once the microcode has been loaded into the dual-port RAM by the M68000 core or other
bus master, the microcode from RAM option is enabled in the reserved register at location
$0F8. When the user writes $0001 to location $0F8, the RISC processor will execute micro-
code from RAM once the CP is reset in the command register. Hereafter, the RISC proces-
sor can freely address both the dual-port RAM and its own private ROM.
MOTOROLA
PB8 REQUEST
CONTROLLER
RISC
CR REQUEST
SERIAL
SERVICE
REQUESTS
Figure C-1. CP Architecture Running RAM Microcode
CHANNELS
CR
OTHER
SERIAL
CHANNELS
6 SDMA
FIFO
PERIPHERAL BUS
SCC1
MC68302 USER’S MANUAL
FIFO
MICROCODE
ROM
M68000 BUS
PHYSICAL INTERFACE
SERIAL CHANNELS
FIFO
SCC2
FIFO
MICROCODE
DUAL-PORT
RAM
DUAL-PORT RAM
FIFO
SCC3
PARAMETER
FIFO
RAM
REGS
PHY
I/F
REGS
PORT
SCC
H/W
PINS
I/O
A
C-1