mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 539

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

22.4.1.5.11 READ_MEM.sz, READ_MEM.sz_WS
Read data at the specified memory address. The reference address is transmitted as three 8-bit packets (msb
to lsb) immediately after the command packet. The access attributes are defined by BAAR[TT,TM]. The
hardware forces low-order address bits to zeros for word and longword accesses to ensure these accesses
are on 0-modulo-size alignments. If the with-status option is specified, the core status byte (XCSR_SB)
contained in XCSR[31–24] is returned before the read data. XCSR_SB reflects the state after the memory
read was performed.
Freescale Semiconductor
Read memory at the specified address with status
Read memory at the specified address
host →
host →
host →
target
target
target
0x31
0x35
0x39
host →
host →
host →
target
target
target
0x34
0x38
0x30
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Address[23-0]
Address[23-0]
Address[23-0]
host →
host →
host →
target
target
target
Address[23-0]
Address[23-0]
Address[23-0]
host →
host →
host →
target
target
target
D
L
Y
D
L
Y
D
L
Y
READ_MEM.sz_WS
XCSR_SB
XCSR_SB
XCSR_SB
target →
target →
target →
READ_MEM.sz
host
host
host
D
Y
D
Y
D
Y
L
L
L
data[31-24]
data[15-8]
target →
target →
Memory
Memory
data[7-0]
target →
Memory
host
host
host
data[31-24]
data [15-8]
data[7-0]
target →
target →
Memory
Memory
Memory
target →
host
host
host
data[23-16]
data[7-0]
target →
target →
Memory
Memory
host
host
data[23-16]
data [7-0]
target →
Memory
Memory
target →
host
host
Version 1 ColdFire Debug (CF1_DEBUG)
data[15-8]
target →
Memory
host
Non-intrusive
Non-intrusive
data [15-8]
target →
Memory
host
data[7-0]
target →
Memory
host
data [7-0]
Memory
target →
host
22-47