AD73411BBZ-80 Analog Devices Inc, AD73411BBZ-80 Datasheet - Page 26

• Manufacturer Part Number: AD73411BBZ-80
• Manufacturer: Analog Devices Inc

Specifications of AD73411BBZ-80

• Single Supply Voltage (typ): 3.3V
• Single Supply Voltage (min): 3V
• Single Supply Voltage (max): 3.6V
• Package Type: BGA
• Lead Free Status / RoHS Status: Compliant

AD73411
MODE C
0
0
1
1
NOTES
1
2
3
4
5
6
MEMORY ARCHITECTURE
The AD73411 provides a variety of memory and peripheral
interface options. The key functional groups are Program
Memory, Data Memory, Byte Memory, and I/O. Refer to the
following figures and tables for PM and DM memory allocations
in the AD73411.
PROGRAM MEMORY
Program Memory (Full Memory Mode) is a 24-bit-wide
space for storing both instruction op codes and data. The
AD73411-80 has 16K words of Program Memory RAM on chip
(the AD73411-40 has 8K words of Program Memory RAM on
chip), and the capability of accessing up to two 8K external
memory overlay spaces using the external data bus.
Program Memory (Host Mode) allows access to all internal
memory. External overlay access is limited by a single external
address line (A0). External program execution is not available in
host mode due to a restricted data bus that is only 16 bits wide.
PMOVLAY
0
1
2
All mode pins are recognized while RESET is active (low).
When Mode C = 0, Full Memory enabled. When Mode C = 1, Host Memory Mode enabled.
When Mode B = 0, Autobooting enabled. When Mode B = 1, no Autobooting.
When Mode A = 0, BDMA enabled. When Mode A = 1, IDMA enabled.
Considered as standard operating settings. Using these configurations allows for easier design and better memory management.
Requires additional hardware.
2
MODE B
0
1
0
0
Memory
Internal
External
Overlay 1
External
Overlay 2
Table XIX. PMOVLAY Bits
3
MODE A
0
0
0
1
A13
Not Applicable Not Applicable
0
1
4
space. Program execution is held off until all 32 words have been loaded. Chip is configured
in Full Memory Mode.
0. Chip is configured in Full Memory Mode. BDMA can still be used, but the processor does
not automatically use or wait for these operations.
space. Program execution is held off until all 32 words have been loaded. Chip is config-
ured in Host Mode.
until internal program memory location 0 is written to. Chip is configured in Host Mode.
Booting Method
BDMA feature is used to load the first 32 program memory words from the byte memory
No automatic boot operations occur. Program execution starts at external memory location
BDMA feature is used to load the first 32 program memory words from the byte memory
IDMA feature is used to load any internal memory as desired. Program execution is held off
A12:0
13 LSBs of Address
Between 0x2000
and 0x3FFF
13 LSBs of Address
Between 0x2000
and 0x3FFF
Table XVIII. Modes of Operations
6
5
DATA MEMORY
Data Memory (Full Memory Mode) is a 16-bit-wide space
used for the storage of data variables and for memory-mapped
control registers. The AD73411-80 has 16K words on Data
Memory RAM on-chip (the AD73411-40 has 8K words on Data
Memory RAM on-chip), consisting of 16,352 user-accessible
locations in the case of the AD73411-80 (8,160 user-accessible
locations in the case of the AD73411-40) and 32 memory-
mapped registers. Support also exists for up to two 8K external
memory overlay spaces through the external data bus. All inter-
nal accesses complete in one cycle. Accesses to external memory
are timed using the wait states specified by the DWAIT register.
INTERNAL
MEMORY
EXTERNAL
MEMORY
PROGRAM MEMORY
PMOVLAY = 1 OR 2
0x0000 – 0x1FFF
PM (MODE B = 0)
ACCESSIBLE
AT ADDRESS
PMOVLAY = 0
8K EXTERNAL
ACCESSIBLE
8K INTERNAL
PMOVLAY = 0
8K INTERNAL
ACCESSIBLE
WHEN
PMOVLAY = 1
MODE B = 0
ALWAYS
WHEN
1
ACCESSIBLE
WHEN
PMOVLAY = 2
OR
0x2000–
0x3FFF
ADDRESS
0x3FFF
0x1FFF
0x0000
0x2000
0x2000–
0x3FFF
0x2000–
0x3FFF
2
INTERNAL
MEMORY
2
1
2
WHEN MODE B = 1, PMOVLAY MUST BE
SET TO 0
SEE TABLE XIX FOR PMOVLAY BITS
EXTERNAL
MEMORY
PROGRAM MEMORY
8K EXTERNAL
8K INTERNAL
PMOVLAY = 0
MODE B = 1
PM (MODE B = 1)
PMOVLAY = 0
ACCESSIBLE
RESERVED
ACCESSIBLE
WHEN
PMOVLAY = 0
WHEN
RESERVED
ADDRESS
1
0x3FFF
0x1FFF
0x0000
0x2000
0x2000–
0x3FFF
0x0000–
0x1FFF
5
2