MC68EC040FE25A Freescale Semiconductor, MC68EC040FE25A Datasheet - Page 57

• Manufacturer Part Number: MC68EC040FE25A
• Description: IC MPU 32BIT 25MHZ 184-CQFP
• Manufacturer: Freescale Semiconductor
• Series: M68000r

Specifications of MC68EC040FE25A

• Processor Type: M680x0 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 184-CQFP
• Core Size: 32bit
• Program Memory Size: 8KB
• Cpu Speed: 25MHz
• Digital Ic Case Style: CQFP
• No. Of Pins: 184
• Supply Voltage Range: 4.75V To 5.25V
• Operating Temperature Range: 0°C To
• Rohs Compliant: Yes
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 25MHz
• Instruction Set Architecture: RISC
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 184
• Package Type: CQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Compliant

ADS_SEL(0:2)
ADS_ACK
PD(0:7)
HOST_REQ
B.3.2
The signal handshake during an M68360QUADS-040 to Host write cycle is shown in FIGURE B-3. The
sequence of events is as follows:
6. The Host detects the ADS_ACK signal and negates the HOST_REQ signal (data buffer is
7. The M68360QUADS-040 detects the negation of HOST_REQ signal and negates
1. The M68360QUADS-040 places a data byte on the parallel port data bus (buffer disabled)
2. The Host polls each M68360QUADS-040 address and detects the ADS_REQ signal from
3. The M68360QUADS-040 negates the ADS_REQ signal. The data appears on the bus as
4. The Host reads the data.
5. The Host negates the HST_ACK signal to end the cycle. The M68360QUADS-040 ends
Write Cycle from M68360QUADS-040 to Host
disabled).
ADS_ACK to end the cycle.
and asserts the ADS_REQ signal (the ADS_REQ signal will not appear on the port until
the board is selected by the Host).
the requesting board. The Host asserts the HST_ACK signal in response, which enables
the data buffer in the M68360QUADS-040.
long as the HST_ACK signal is asserted.
the cycle.
FIGURE B-2 Host Write to M68360QUADS-040
Freescale Semiconductor, Inc.
For More Information On This Product,
2
1
M68360QUADS-040 Hardware User’s Manual
ADDRESS VALID
Go to: www.freescale.com
3
DATA VALID
4
5
6
SUPPORT INFORMATION
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