MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 57

• Manufacturer Part Number: MC68376BGMAB20
• Description: IC MCU 32BIT 8K ROM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68376BGMAB20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Ram Size: 7.5K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 160-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

4.2.2 Address Registers
MC68336/376
USER’S MANUAL
Each address register and stack pointer is 32 bits wide and holds a 32-bit address. Ad-
dress registers cannot be used for byte-sized operands. Therefore, when an address
register is used as a source operand, either the low-order word or the entire long-word
operand is used, depending upon the operation size. When an address register is
used as the destination operand, the entire register is affected, regardless of the op-
eration size. If the source operand is a word size, it is sign-extended to 32 bits. Ad-
dress registers are used primarily for addresses and to support address computation.
The instruction set includes instructions that add to, subtract from, compare, and move
the contents of address registers. Figure 4-5 shows the organization of addresses in
address registers.
31
31
31
31
MSB
MSB
HIGH-ORDER BYTE
31
63
30
62
HIGH-ORDER WORD
Figure 4-4 Data Organization in Data Registers
24
23
MIDDLE HIGH BYTE
LOW-ORDER LONG WORD
CENTRAL PROCESSOR UNIT
HIGH-ORDER LONG WORD
QUAD-WORD
LONG WORD
LONG WORD
WORD
16 15
BYTE
16 15
MIDDLE LOW BYTE
LOW-ORDER WORD
8 7
LOW-ORDER BYTE
1
1
LSB
LSB
32
0
0
0
0
0
MOTOROLA
CPU32 DATA ORG
4-5