MC68306FC16B Freescale Semiconductor, MC68306FC16B Datasheet - Page 50

• Manufacturer Part Number: MC68306FC16B
• Description: IC MPU INTEGRATED 132-PQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68306FC16B

• Processor Type: M683xx 32-Bit
• Speed: 16MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-MQFP, 132-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

When a bus request is made after the MPU has begun a bus cycle and before AS has
been asserted (S0), the special sequence shown in Figure 3-20 applies. Instead of being
asserted on the next rising edge of clock, BG is delayed until the second rising edge
following its internal assertion.
3-18
G = Bus Grant
R = Bus Request Internal
A = Bus Grant Acknowledge Internal
T = Three-state Control to Bus Control Logic
X = Don't Care
Figure 3-17. Bus Arbitration Unit State Diagrams
RA
X
STATE 2
GT
R
XX
STATE 1
GT
Freescale Semiconductor, Inc.
GT
For More Information On This Product,
GT
(a) 3-Wire Bus Arbitration
(b) 2-Wire Bus Arbitration
RA
XA
RA
R
RA
MC68306 USER'S MANUAL
R
1
Go to: www.freescale.com
RA
STATE 3
STATE 0
R
GT
GT
GT
RA
GT
GT
RA
RA
R
RA
RA
R+A
XA
X
XX
R
1
STATE 4
GT
GT
GT
Notes:
RX
1. State machine will not change if
2. The address bus will be placed in
the bus is S0 or S1. Refer to
BUS ARBITRATION CONTROL.
the high-impedance state if T is
asserted and AS is negated.
RA
MOTOROLA
5.2.3.