MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 105

• Manufacturer Part Number: MOD5234-100IR
• Description: MOD5234 10/100 ETHERNET MODULE
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

Specifications of MOD5234-100IR

• Interface: I²C, SPI, UART
• Voltage - Supply: 2.5V
• Mounting Type: Surface Mount
• Package / Case: Module
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Baud Rates: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q4483564

FF1
Operation:
Assembler Syntax:
Attributes:
The data register, Dx, is scanned, beginning from the most-significant bit (Dx[31]) and ending
with the least-significant bit (Dx[0]), searching for the first set bit. The data register is then loaded
with the offset count from bit 31 where the first set bit appears, as shown below. If the source
data is zero, then an offset of 32 is returned.
Instruction Field:
Freescale Semiconductor
Condition
Codes:
•
Instruction
Format:
Destination Register field—Specifies the destination data register, Dx.
Opcode present
—
X
FF1
15
0
N
∗
14
0
FF1.L Dx
Bit Offset of the First Logical One in Register → Destination
Size = longword
Z
∗
13
0
Find First One in Register
(Supported Starting with ISA A+)
0b00000 . . . 0010
0b00000 . . . 0001
0b00000 . . . 0000
12
V
0
0
0b001-- . . . ----
0b01--- . . . ----
MCF5235 Reference Manual, Rev. 2
0b1---- . . . ----
Old Dx[31:0]
V2, V3 Core (ISA_A)
11
0
...
C
0
No
10
1
X Not affected
N Set if the msb of the source operand is set; cleared
Z Set if the source operand is zero; cleared otherwise
V Always cleared
C Always cleared
0
9
otherwise
New Dx[31:0]
0
8
0x0000 0000
0x0000 0001
0x0000 0002
0x0000 001E
0x0000 001F
0x0000 0020
V4 Core (ISA_B)
...
1
7
ColdFire Instruction Set Architecture Enhancements
No
1
6
5
0
4
0
V2 Core (ISA_A+)
3
0
Yes
2
Register, Dx
FF1
Destination
1
0
3-29