MC68332ACFC25 Freescale Semiconductor, MC68332ACFC25 Datasheet - Page 30

• 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: -

30
MOTOROLA
Chip-select assertion can be synchronized with bus control signals to provide output enable, read/write
strobes, or interrupt acknowledge signals. Logic can also generate DSACK signals internally. A single
DSACK generator is shared by all circuits. Multiple chip selects assigned to the same address and con-
trol must have the same number of wait states.
Chip selects can also be synchronized with the ECLK signal available on ADDR23.
When a memory access occurs, chip-select logic compares address space type, address, type of ac-
cess, transfer size, and interrupt priority (in the case of interrupt acknowledge) to parameters stored in
chip-select registers. If all parameters match, the appropriate chip-select signal is asserted. Select sig-
nals are active low. Refer to the following block diagram of a single chip-select circuit.
The following table lists allocation of chip-selects and discrete outputs on the pins of the MCU.
BUS CONTROL
DSACK
AVEC
INTERNAL
ADDRESS
SIGNALS
GENERATOR
AVEC
Freescale Semiconductor, Inc.
Figure 9 Chip-Select Circuit Block Diagram
CSBOOT
For More Information On This Product,
ADDR19
ADDR20
ADDR21
ADDR22
ADDR23
BGACK
BASE ADDRESS REGISTER
ADDRESS COMPARATOR
FC0
FC1
FC2
Pin
BR
BG
OPTION COMPARE
OPTION REGISTER
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GENERATOR
DSACK
Chip Select
CSBOOT
CS10
CS0
CS1
CS2
CS3
CS4
CS5
CS6
CS7
CS8
CS9
ASSIGNMENT
REGISTER
PIN
Discrete Outputs
CONTROL
TIMING
ECLK
AND
PC0
PC1
PC2
PC3
PC4
PC5
PC6
—
—
—
—
REGISTER
DATA
PIN
PIN
CHIP SEL BLOCK
MC68332TS/D
MC68332