MC68306EH16B Freescale Semiconductor, MC68306EH16B Datasheet - Page 67

• 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: -

Figure 3-32 shows a synchronous read cycle and the important timing parameters that
apply. The timing for a synchronous read cycle, including relevant timing parameters, is
shown in Figure 3-33.
MOTOROLA
UDS/LDS
CLOCK
DTACK
ADDR
DATA
On the rising edge of the clock, at the end of S7 (which may be the start of
S0 for the next bus cycle), the processor places the address bus in the
high-impedance state. During a write cycle, the processor also places the
data bus in the high-impedance state and drives R/W high. External logic
circuitry should respond to the negation of the AS and UDS /LDS by negating
DTACK and/or BERR . Parameter #28 is the hold time for DTACK, and
parameter #30 is the hold time for BERR .
R/W
AS
6
S0
18
Freescale Semiconductor, Inc.
Figure 3-32. Synchronous Read Cycle
For More Information On This Product,
S1
MC68306 USER'S MANUAL
Go to: www.freescale.com
S2
9
S3
47
S4
S5
27
S6
S7
S0
3- 35