XC56309AG100A Freescale, XC56309AG100A Datasheet - Page 49

• Manufacturer Part Number: XC56309AG100A
• Manufacturer: Freescale

Specifications of XC56309AG100A

• Device Core Size: 24b
• Format: Fixed Point
• Clock Freq (max): 100MHz
• Mips: 100
• Device Input Clock Speed: 100MHz
• Ram Size: 102KB
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: -40C to 100C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: LQFP
• Lead Free Status / RoHS Status: Compliant

2.5.5.5 Asynchronous Bus Arbitration Timings
The asynchronous bus arbitration is enabled by internal synchronization circuits on
synchronization circuits add delay from the external signal until it is exposed to internal logic. As a result of this
delay, a DSP56300 part may assume mastership and assert
reason for timing 250.
Once
DSP56300 components that are potential masters on the same bus. If
is asserted and
Therefore, some non-overlap period between one
ensures that overlaps are avoided.
Freescale Semiconductor
250
251
Notes:
No.
BB
BB assertion window from BG input deassertion
Delay from BB assertion to BG assertion
1.
2.
3.
4.
5.
is asserted, there is a synchronization delay from
Bit 13 in the Operating Mode Register must be set to enter Asynchronous Arbitration mode.
If Asynchronous Arbitration mode is active, none of the timings in Table 2-14 is required.
An expression is used to compute the maximum or minimum value listed, as appropriate.
Asynchronous Arbitration mode is recommended for operation at 100 MHz.
In order to guarantee timings 250, and 251, BG inputs must be asserted to different DSP56300 devices on the same bus in the
non-overlap manner shown in Figure 2-26.
BB
is deasserted, another DSP56300 component may assume mastership at the same time.
BG1
BB
BG2
Figure 2-26.
Characteristics
Table 2-15.
5
DSP56309 Technical Data, Rev. 7
5
Asynchronous Bus Arbitration Timing
BG
Asynchronous Bus Timings
input active to another
BB
BB
250
assertion to the time this assertion is exposed to other
, for some time after
250+251
BG
input is asserted before that time, and
BG
Expression
251
1, 2
2.5 × Tc + 5
2 × Tc + 5
input active is required. Timing 251
BG
BG
is deasserted. This is the
AC Electrical Characteristics
3
and
BB
Min
—
inputs. These
25
100 MHz
Max
30
—
4
Unit
ns
ns
2-29
BG