MC9S12XD256VAG Freescale Semiconductor, MC9S12XD256VAG Datasheet - Page 228
MC9S12XD256VAG
Manufacturer Part Number
MC9S12XD256VAG
Description
IC MCU 256K FLASH 144-LQFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.MC9S12XD64CAA.pdf
(1348 pages)
Specifications of MC9S12XD256VAG
Core Processor
HCS12X
Core Size
16-Bit
Speed
80MHz
Connectivity
CAN, EBI/EMI, I²C, IrDA, LIN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
119
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
14K x 8
Voltage - Supply (vcc/vdd)
2.35 V ~ 5.5 V
Data Converters
A/D 24x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 105°C
Package / Case
144-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
Price
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Part Number:
MC9S12XD256VAG
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BFFO
Chapter 6 XGATE (S12XGATEV2)
Operation
FirstOne (RS)
Searches the first “1” in register RS (from MSB to LSB) and writes the bit position into the destination
register RD. The upper bits of RD are cleared. In case the content of RS is equal to $0000, RD will be
cleared and the carry flag will be set. This is used to distinguish a “1” in position 0 versus no “1” in the
whole RS register at all.
CCR Effects
1
Code and CPU Cycles
228
N:
Z:
V:
C:
BFFO RD, RS
0
N
Before executing the instruction
0; cleared.
Set if the result is $0000; cleared otherwise.
0; cleared.
Set if RS = $0000
Z
0
V
Source Form
C
RD;
1
; cleared otherwise.
Address
MC9S12XDP512 Data Sheet, Rev. 2.21
Mode
DYA
Bit Field Find First One
0
0
0
0
1
Machine Code
RD
RS
1
0
Freescale Semiconductor
BFFO
0
0
0
Cycles
P
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