MC68EC000EI16 Freescale Semiconductor, MC68EC000EI16 Datasheet - Page 25

• Manufacturer Part Number: MC68EC000EI16
• Description: IC MPU 32BIT 16MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC000EI16

• Processor Type: M680x0 32-Bit
• Speed: 16MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

Introduction
1.4 INTEGER DATA FORMATS
The operand data formats supported by the integer unit, as listed in Table 1-3, include those
supported by the MC68030 plus a new data format (16-byte block) for the MOVE16
instruction. Integer unit operands can reside in registers, memory, or instructions
themselves. The operand size for each instruction is either explicitly encoded in the
instruction or implicitly defined by the instruction operation.
1-14
Address Mask
E—Enable
S—Supervisor/User Mode
U1, U2—User Page Attributes
CM—Cache Mode
W—Write Protect
This 8-bit field contains a mask for the address base field. Setting a bit in this field causes
This bit enables and disables transparent translation/access control of the block defined
This field specifies the use of the FC2 in matching an address.
The MC68040, MC68E040, MC68LC040 do not interpret these user-defined bits. If an
This field selects the cache mode and access serialization for a page as follows:
This bit indicates if the block is write protected. If set, write and read-modify-write
the corresponding bit in the address base field to be ignored. Blocks of memory larger
than 16 Mbytes can be transparently translated/access controlled by setting some logical
address mask bits to ones. The low-order bits of this field normally are set to define con-
tiguous blocks larger than 16 Mbytes, although this not required.
by this register.
external bus transfer results from the access, U0 and U1 are echoed to the UPA0 and
UPA1 signals, respectively.
accesses are aborted as if the resident bit in a table descriptor were clear.
00 = Match only if FC2 is 0 (user mode access)
01 = Match only if FC2 is 1 (supervisor mode access)
1X = Ignore FC2 when matching
00 = Cachable, Writethrough
01 = Cachable, Copyback
10 = Noncachable, Serialized
11 = Noncachable
0 = Transparent translation/access control disabled
1 = Transparent translation/access control enabled
0 = Read and write accesses permitted
1 = Write accesses not permitted
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
MOTOROLA