UPD705100GJ-100-8 NEC [NEC], UPD705100GJ-100-8 Datasheet - Page 24

• Manufacturer Part Number: UPD705100GJ-100-8
• Description: V830TM 32-BIT MICROCONTROLLER
• Manufacturer: NEC [NEC]

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9. DATA SETS
9.1 Data Types
be aligned with byte, halfword, or word boundaries, respectively. Addressing is based on little endian.
(1) Byte data
(2) Halfword data
(3) Word data
The V830 supports three data types: byte (8 bits), halfword (16 bits), and word (32 bits). Data of these types must
One byte of data consists of eight consecutive bits, each of which is named. Bit 0 is the LSB (Least Significant
Bit) while bit 7 is the MSB (Most Significant Bit). This data can be placed at any address.
One halfword of data consists of 16 consecutive bits, each of which is named. Bit 0 is the LSB, while bit 15 is
the MSB. Halfword data must be aligned with halfword boundaries (in address areas such that bit 0 of the address
of the segment containing bit 0 is 0).
One word of data consists of 32 consecutive bits, each of which is named. Bit 0 is the LSB and bit 31 is the MSB.
Word data must be aligned with word boundaries (in address areas such that bits 0 and 1 of the address of the
segment containing bit 0 are 0).
Address
Address
15
31
Address
A + 3
MSB
7
A + 1
A + 2
16 15
8 7
A = 2n (where n is a positive integer)
A = 4n (where n is a positive integer)
A + 1
LSB
A
0
0
A
0
A
PD705100