mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 57

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

4.3
An MCF51AC256 series microcontrollers include up to 32 KB of static RAM. RAM is most efficiently
accessed using the A5-relative addressing mode (address register indirect with displacement mode). Any
single bit in this area can be accessed with the bit manipulation instructions (BCLR, BSET, etc.).
At power-on, the contents of RAM are uninitialized. RAM data is unaffected by any reset provided that
the supply voltage does not drop below the minimum value for RAM retention (V
Freescale Semiconductor
0x(FF)FF_FFDC–
0x(FF)FF_FFED–
0x(FF)FF_FFC0–
0x(FF)FF_FFD1–
0x(FF)FF_FFFD–
0x(FF)FF_FFE1–
0x(FF)FF_FFE5–
0x(FF)FF_FFE9–
0x(FF)FF_FFF1–
0x(FF)FF_FFF5–
0x(FF)FF_FFF9–
0x(FF)FF_FFDD
0x(FF)FF_FFCF
0x(FF)FF_FFDA
0x(FF)FF_FFDB
0x(FF)FF_FFDE
0x(FF)FF_FFDF
0x(FF)FF_FFEB
0x(FF)FF_FFEC
0x(FF)FF_FFFC
0x(FF)FF_FFD0
0x(FF)FF_FFD7
0x(FF)FF_FFD8
0x(FF)FF_FFD9
0x(FF)FF_FFE0
0x(FF)FF_FFE3
0x(FF)FF_FFE4
0x(FF)FF_FFE7
0x(FF)FF_FFE8
0x(FF)FF_FFEF
0x(FF)FF_FFF0
0x(FF)FF_FFF3
0x(FF)FF_FFF4
0x(FF)FF_FFF7
0x(FF)FF_FFF8
0x(FF)FF_FFFB
0x(FF)FF_FFFF
RAM
Address
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
INTC_LVL1IACK
INTC_LVL2IACK
INTC_LVL3IACK
INTC_LVL4IACK
INTC_LVL5IACK
INTC_LVL6IACK
INTC_LVL7IACK
Register Name
INTC_SWIACK
Table 4-6. V1 ColdFire Interrupt Controller Memory Map
INTC_PL6P7
INTC_PL6P6
INTC_SFRC
INTC_CFRC
INTC_WCR
INTC_FRC
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
msb
ENB
—
—
—
—
—
—
—
—
—
—
—
—
0
0
0
0
0
0
0
0
0
0
0
0
0
LVL1
—
—
—
—
—
—
—
—
—
—
—
—
0
0
0
0
0
LVL2
—
—
—
—
—
—
—
—
—
—
—
—
0
LVL3
Bit Number
—
—
—
—
—
—
—
—
—
—
—
—
0
VECN
VECN
VECN
VECN
VECN
VECN
VECN
VECN
LVL4
—
—
—
—
—
—
—
—
—
—
—
—
0
REQN
REQN
SET
CLR
LVL5
—
—
—
—
—
—
—
—
—
—
—
—
RAM
MASK
LVL6
).
—
—
—
—
—
—
—
—
—
—
—
—
LVL7
lsb
—
—
—
—
—
—
—
—
—
—
—
—
Memory
4-13