MC68306EH16B Freescale Semiconductor, MC68306EH16B Datasheet - Page 34

• Manufacturer Part Number: MC68306EH16B
• Description: IC MPU INTEGRATED 16MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68306EH16B

• Processor Type: M683xx 32-Bit
• Speed: 16MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-MQFP, 132-PQFP
• Controller Family/series: 68K
• Core Size: 32 Bit
• Cpu Speed: 16.7MHz
• No. Of Timers: 1
• Embedded Interface Type: UART
• Digital Ic Case Style: PQFP
• Supply Voltage Range: 4.75V To 5.25V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

The word read cycle flowchart is shown in Figure 3-1. The byte read cycle flowchart is
shown in Figure 3-2. The read and write cycle timing is shown in Figure 3-3. Figure 3-4
shows the word and byte read cycle timing diagram.
3-2
1) SET R/W TO READ
2) PLACE FUNCTION CODE ON FC2–FC0
3) PLACE ADDRESS ON ADDRESS BUS
4) ASSERT ADDRESS STROBE (AS)
5) ASSERT UPPER DATA STROBE (UDS)
1) SET R/W TO READ
2) PLACE FUNCTION CODE ON FC2–FC0
3) PLACE ADDRESS ON ADDRESS BUS
4) ASSERT ADDRESS STROBE (AS)
5) ASSERT UPPER DATA STROBE (UDS)
1) LATCH DATA
2) NEGATE UDS AND LDS
3) NEGATE AS
1) LATCH DATA
2) NEGATE UDS AND LDS
3) NEGATE AS
OR LOWER DATA STROBE (LDS)
(BASED ON A0)
AND LOWER DATA STROBE (LDS)
ADDRESS THE DEVICE
ADDRESS THE DEVICE
ACQUIRE THE DATA
ACQUIRE THE DATA
START NEXT CYCLE
START NEXT CYCLE
BUS MASTER
BUS MASTER
Figure 3-1. Word Read Cycle Flowchart
Figure 3-2. Byte Read Cycle Flowchart
Freescale Semiconductor, Inc.
For More Information On This Product,
MC68306 USER'S MANUAL
Go to: www.freescale.com
1) DECODE ADDRESS
2) PLACE DATA ON D7–D0 OR D15–D8
3) ASSERT DATA TRANSFER
1) REMOVE DATA FROM D7–D0
2) NEGATE DTACK
1) DECODE ADDRESS
2) PLACE DATA ON D15–D0
3) ASSERT DATA TRANSFER
1) REMOVE DATA FROM D15–D0
2) NEGATE DTACK
OR D15–D8
(BASED ON UDS OR LDS)
ACKNOWLEDGE (DTACK)
ACKNOWLEDGE (DTACK)
TERMINATE THE CYCLE
TERMINATE THE CYCLE
OUTPUT THE DATA
OUTPUT THE DATA
SLAVE
SLAVE
MOTOROLA