MC68EC000EI12 Freescale Semiconductor, MC68EC000EI12 Datasheet - Page 175

• Manufacturer Part Number: MC68EC000EI12
• Description: IC MPU 32BIT 12MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor
• Series: 68K - M680X0r

Specifications of MC68EC000EI12

• Processor Type: M680x0 32-Bit
• Speed: 12MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Core Size: 32 Bit
• Cpu Speed: 12MHz
• Digital Ic Case Style: PLCC
• No. Of Pins: 68
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: 0°C To +70°C
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Clock Frequency: 12MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

CHK2
Operation:
Assembler
Syntax:
Attributes:
Description: Compares the value in Rn to each bound. The effective address contains the
Condition Codes:
MOTOROLA
bounds pair: the upper bound following the lower bound. For signed comparisons, the
arithmetically smaller value should be used as the lower bound. For unsigned
comparisons, the logically smaller value should be the lower bound.
The size of the data and the bounds can be specified as byte, word, or long. If Rn is a
data register and the operation size is byte or word, only the appropriate low-order part
of Rn is checked. If Rn is an address register and the operation size is byte or word,
the bounds operands are sign-extended to 32 bits, and the resultant operands are
compared to the full 32 bits of An.
If the upper bound equals the lower bound, the valid range is a single value. If the reg-
ister value is less than the lower bound or greater than the upper bound, a CHK instruc-
tion exception (vector number 6) occurs.
X — Not affected.
N — Undefined.
Z — Set if Rn is equal to either bound; cleared otherwise.
V — Undefined.
C — Set if Rn is out of bounds; cleared otherwise.
—
X
N
U
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
If Rn < LB or Rn > UB
CHK2 < ea > ,Rn
Size = (Byte, Word, Long)
Z
Then TRAP
(MC68020, MC68030, MC68040, CPU32)
Check Register Against Bounds
U
V
C
Integer Instructions
CHK2
4-71