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HCS12 Datasheet(PDF) 177 Page - Freescale Semiconductor, Inc

Part # HCS12
Description  HCS12 Microcontrollers
PDF  452 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

HCS12 Datasheet(HTML) 177 Page - Freescale Semiconductor, Inc

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Glossary
S12CPUV2 Reference Manual, Rev. 4.0
Freescale Semiconductor
177
Operation:
(D)
× (Y) ⇒ Y : D
Description:
An unsigned 16-bit value is multiplied by an unsigned 16-bit value to
produce an unsigned 32-bit result. The first source operand must be loaded
into 16-bit double accumulator D and the second source operand must be
loaded into index register Y before executing the instruction. When the
instruction is executed, the value in D is multiplied by the value in Y. The
upper 16-bits of the 32-bit result are stored in Y and the low-order 16-bits of
the result are stored in D.
The C status bit can be used to round the high-order 16 bits of the result.
EMUL
Extended Multiply
16-Bit by 16-Bit (Unsigned)
EMUL
CCR Details:
S
X
HIN
Z
V
C
––––
∆∆
–
∆
N: Set if the MSB of the result is set; cleared otherwise
Z: Set if result is $00000000; cleared otherwise
C: Set if bit 15 of the result is set; cleared otherwise
Source Form
Address
Mode
Object Code
Access Detail
HCS12
M68HC12
EMUL
INH
13
ffO
ffO



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