MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 337
![no-image](/images/manufacturer_photos/0/2/262/freescale_semiconductor_sml.jpg)
MC68EC000EI20
Manufacturer Part Number
MC68EC000EI20
Description
IC MPU 32BIT 20MHZ 68-PLCC
Manufacturer
Freescale Semiconductor
Specifications of MC68EC000EI20
Processor Type
M680x0 32-Bit
Speed
20MHz
Voltage
3.3V, 5V
Mounting Type
Surface Mount
Package / Case
68-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68EC000EI20
Manufacturer:
FREESCALE
Quantity:
772
Company:
Part Number:
MC68EC000EI20
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Company:
Part Number:
MC68EC000EI20R
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
- Current page: 337 of 646
- Download datasheet (3Mb)
FDBcc
Instruction Format:
Instruction Fields:
MOTOROLA
15
1
0
Count Register field—Specifies data register that is used as the counter.
Conditional Predicate field—Specifies one of the 32 floating-point conditional tests as
Displacement field—Specifies the branch distance (from the address of the instruction
14
1
0
described in 3.6.2 Conditional Testing.
plus two) to the destination in bytes.
13
The terminating condition is like that defined by the UNTIL loop
constructs of high-level languages. For example: FDBOLT can
be stated as "decrement and branch until ordered less than".
There are two basic ways of entering a loop: at the beginning or
by branching to the trailing FDBcc instruction. If a loop structure
terminated with FDBcc is entered at the beginning, the control
counter must be one less than the number of loop executions
desired. This count is useful for indexed addressing modes and
dynamically specified bit operations. However, when entering a
loop by branching directly to the trailing FDBcc instruction, the
count should equal the loop execution count. In this case, if the
counter is zero when the loop is entered, the FDBcc instruction
does not branch, causing a complete bypass of the main loop.
When a BSUN exception occurs, a preinstruction exception is
taken by the main processor. If the exception handler returns
without modifying the image of the program counter on the stack
frame (to point to the instruction following the FDBcc), then it
must clear the cause of the exception (by clearing the NAN bit or
disabling the BSUN trap), or the exception will occur again im-
mediately upon return to the routine that caused the exception.
1
0
12
1
0
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
11
0
COPROCESSOR
Floating-Point Test Condition,
Decrement, and Branch
10
ID
0
(MC6888X, MC68040)
9
0
16-BIT DISPLACEMENT
8
0
0
NOTE
7
0
0
6
1
0
5
0
CONDITIONAL PREDICATE
4
0
Floating Point Instructions
3
1
2
FDBcc
REGISTER
COUNT
1
5-35
0
Related parts for MC68EC000EI20
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![MC14560BCP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC12034AP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MPIC2112P](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC14520BCP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC12026AP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC145152P2](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC68HC11A0P](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MCM6726DWJ10](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC44355](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC13282AP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC14519BCP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC14495P1](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![SN74LS796N](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC142100CP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC34014P](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet: