msm7630 Oki Semiconductor, msm7630 Datasheet - Page 36
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msm7630
Manufacturer Part Number
msm7630
Description
Universal Speech Processor
Manufacturer
Oki Semiconductor
Datasheet
1.MSM7630.pdf
(95 pages)
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Half-Word Data Access
¡ Semiconductor
3.2 Memory Data Format
The following memory data formats are supported: byte (8 bits), half-word (16 bits), and word (32
bits). Memory addresses are always byte addresses regardless of data format. However, half-word
accesses must be on 16-bit boundaries (least significant bit is "0"), and word accesses must be on 32-
bit boundaries (least significant 2 bits are "00"). If a load or store instruction execution attempts a
memory access that violates these boundaries, then a data address invalid exception will occur.
Memory addressing is big-endian. The diagrams below show memory data formats for byte data
access, half-word data access, and word data access.
Word Data Access
Byte Data Access
Address
Address
Address
bit
bit
bit
31
31
31
byte
n
half word
24
n
23
byte
n+1
16 15
16 15
word
n
byte
n+2
half word
8 7
n+1
byte
n+3
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