MC68332ACFC25 Freescale Semiconductor, MC68332ACFC25 Datasheet - Page 102

• Manufacturer Part Number: MC68332ACFC25
• Description: IC MCU 32BIT 25MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68332ACFC25

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SCI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Type: ROMless
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 132-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

5-4
31
BYTE
31
16-BIT WORD
31
LONG-WORD
31
LONG-WORD
QUAD-WORD
63
31
MSB
MSB
Each of data registers D7–D0 is 32 bits wide. Byte operands occupy the low-order 8
bits; word operands, the low-order 16 bits; and long-word operands, the entire 32 bits.
When a data register is used as either a source or destination operand, only the ap-
propriate low-order byte or word (in byte or word operations, respectively) is used or
changed; the remaining high-order portion is unaffected. The least significant bit (LSB)
of a long-word integer is addressed as bit zero, and the most significant bit (MSB) is
addressed as bit 31. Figure 5-4 shows the organization of various types of data in the
data registers.
Quad-word data consists of two long words and represents the product of 32-bit mul-
tiply or the dividend of 32-bit divide operations (signed and unsigned). Quad-words
may be organized in any two data registers without restrictions on order or pairing.
There are no explicit instructions for the management of this data type, although the
MOVEM instruction can be used to move a quad-word into or out of the registers.
Binary-coded decimal (BCD) data represents decimal numbers in binary form. CPU32
BCD instructions use a format in which a byte contains two digits. The four LSB con-
tain the least significant digit, and the four MSB contain the most significant digit. The
ABCD, SBCD, and NBCD instructions operate on two BCD digits packed into a single
byte.
HIGH-ORDER BYTE
30
62
HIGH-ORDER BYTE
Figure 5-4 Data Organization in Data Registers
24 23
Freescale Semiconductor, Inc.
For More Information On This Product,
MIDDLE HIGH BYTE
CENTRAL PROCESSING UNIT
Go to: www.freescale.com
ANY Dy
16 15
16 15
ANY Dy
MIDDLE LOW BYTE
LOW-ORDER WORD
8 7
LOW-ORDER BYTE
USER’S MANUAL
1
MC68332
1
LSB
LSB
32
0
0
0
0
0