MC68302EH16C Freescale Semiconductor, MC68302EH16C Datasheet - Page 355
MC68302EH16C
Manufacturer Part Number
MC68302EH16C
Description
IC MPU MULTI-PROTOCOL 132-PQFP
Manufacturer
Freescale Semiconductor
Datasheets
1.MC68302AG20C.pdf
(4 pages)
2.MC68302AG20C.pdf
(2 pages)
3.MC68302AG20C.pdf
(13 pages)
4.MC68302EH16C.pdf
(481 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68302EH16C
Manufacturer:
Freescale Semiconductor
Quantity:
135
Company:
Part Number:
MC68302EH16C
Manufacturer:
PANA
Quantity:
99
Company:
Part Number:
MC68302EH16C
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC68302EH16C
Manufacturer:
FREESCALE
Quantity:
20 000
Company:
Part Number:
MC68302EH16CB1
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Company:
Part Number:
MC68302EH16CR2
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
- MC68302AG20C PDF datasheet
- MC68302AG20C PDF datasheet #2
- MC68302AG20C PDF datasheet #3
- MC68302EH16C PDF datasheet #4
- Current page: 355 of 481
- Download datasheet (2Mb)
For proper timing of write cycles, it is important to know how much time elapses between
CS negated and the data out hold time. With a 16.67-MHz MC68302, this value is a 10-ns
minimum. Thus, on a CS-controlled RAM write cycle, the RAM required data hold time must
be <= 10 ns. For the MCM6206, it is 0 ns.
D.2 SWITCHING THE EXTERNAL ROM AND RAM USING THE MC68302
When designing with the MC68302 (or simply the M68000), one of the tasks often required
is to switch the locations of the ROM and RAM in the system. This is because the reset vec-
tor needs to be supplied from ROM; whereas, the rest of the exception vectors are normally
included in RAM so that they can be modified. The exception vector area extends from $0
to $FF.
The MC68302 makes this switch easy to perform, requiring no additional glue logic. Two
chip-select lines and a few temporary locations of the dual-port RAM are used. For this ex-
ample, 256 kbytes of EPROM and 64 kbytes of RAM are used.
D.2.1 Conditions at Reset
We physically connect CS0 to the ROM and CS1 to the RAM. After reset, the MC68302 de-
faults to having only one chip select enabled (CS0), with a base address of $0 and a range
of 8 kbytes. The ROM should be programmed with an initial set of interrupt vectors, and the
reset vector should point to some location within the first 8 k of ROM. CS1 is disabled at re-
set so the RAM cannot be accessed. Also, the base address register (BAR) in the MC68302
has not been written; therefore, the dual-port RAM and other on-chip peripherals cannot be
accessed. The status register (SR) of the M68000 core is $2700, putting the core in super-
visor mode with interrupts masked. The SR is left in this condition until the ROM and RAM
are switched.
D.2.2 First Things First
The following situation now exists:
Once the reset vector has been taken, the BAR at location $0F2 should be written to locate
the MC68302 dual-port RAM and on-chip peripheral registers in memory. In this example,
$700000 is chosen as the starting point of the 4 k block of the MC68302 internal address
space; thus, we write $0700 to BAR. BAR exists internal to the MC68302 and is easily ac-
cessed even though it overlaps memory with ROM. CS0 will not activate on accesses to the
BAR.
Now that the MC68302 can be fully accessed, the ROM and RAM chip selects can be mod-
ified. First, the option register (OR) of CS0 can be extended to include all 256 kbytes by writ-
ing the base address mask in OR0 with 11111100000b. At this time, the DTACK field may
be changed to reduce the number of wait states from six to something lower. Also, while writ-
MOTOROLA
• ROM—Begins at $0; only first 8 kbytes are valid for programming.
• RAM—Undefined.
• MC68302—Undefined (except BAR at $0F2 and SCR at $0F4).
2-1/2 clocks –data setup time–CS maximum asserted time = 150 - 7 - 40 = 103 ns.
MC68302 USER’S MANUAL
MC68302 Applications
D-5
Related parts for MC68302EH16C
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
MC68302 Configuring the Chip Selects on the MC68302
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68302 Design Concept - Expanding Interrupts on the MC68302
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68302 MC68302 Adapting a WAN Controller to a LAN Environment
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68302 EKB Applications - Power Measurements on the MC68302
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68302 Interfacing the MC68020 to a Slave MC68302
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68302 MC68302 Software Performance
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68302 Evaluating EDX on the ADS302
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68302 Design Advisory #1 - MC68SC302 Passive ISDN Protocol Engine
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68302, MC68360, and MPC860 Characteristics and Design Notes for Crystal Feedback Oscillators
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
Mc68302 Integrated Multi-protocol Processor
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet: