MC68340PV16VE Freescale Semiconductor, MC68340PV16VE Datasheet - Page 397

• Manufacturer Part Number: MC68340PV16VE
• Description: IC MCU 32BIT 16MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68340PV16VE

• Processor Type: M683xx 32-Bit
• Speed: 16MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

10.2.4 Interfacing an 8-Bit Device to 16-Bit Memory Using Single-
Address DMA Mode
One of the requirements of single-address mode is that the source and destination must
be the same port size. However, the MC68340 can perform direct memory accesses in
single-address mode between an 8-bit device and 16-bit memory. The port size must be
specified as 8 bits, and some external logic is required as shown in Figure 10-14.
During even-byte accesses, the data is transferred directly on D15–D8. However, during
odd-byte accesses, the data must be routed on D15–D8 for the 8-bit device and on D7–
D0 for the 16-bit memory.
10.3 POWER CONSUMPTION CONSIDERATIONS
The MC68340 can be designed into low-power applications that involve high-performance
processing capability (32-bits), high functional density, small size, portable capability, and
battery operation.
The MC68340 fits into the following types of applications:
10-10
• "Palmtop" Computers
• Transaction Tracking
• Bar Code Scanners
— Stylus Input
— Voice Input
— Image Input
— Car Rental
— Cargo
— Courier
— Handheld
Figure 10-14. Circuitry for Interfacing 8-Bit Device to
MC68340
DEVICE
16-Bit Memory in Single-Address DMA Mode
Freescale Semiconductor, Inc.
For More Information On This Product,
SIZ1
SIZ0
R/W
A0
MC68340 USER’S MANUAL
Go to: www.freescale.com
D15-D8
T/R
OE
• CD-I, CD-ROM
• Defense Industry
• Instruments
• Telephony
• Data Entry
• Handheld Games
— Cordless Phones
— Cellular Phones
— Guidance Systems
— Tracking Systems
74F245
B
A
D7-D0
MEMORY
MOTOROLA