PCX7457VGH1000NC Atmel, PCX7457VGH1000NC Datasheet - Page 24

• Manufacturer Part Number: PCX7457VGH1000NC
• Description: IC MPU 32BIT 1000MHZ 483CBGA
• Manufacturer: Atmel

Specifications of PCX7457VGH1000NC

• Processor Type: PowerPC 32-Bit RISC
• Speed: 1.0GHz
• Voltage: 1.1V
• Mounting Type: Surface Mount
• Package / Case: 483-CBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

Figure 7-3.
7.2.3
24
PC7457
ARTRY, SHD0, SHD1)
ARTRY, SHD0, SHD1)
L3 Clock AC Specifications
Input/Output Timing Diagram
(Except TS,
(Except TS,
All Outputs
All Outputs
All Inputs
SYSCLK
ARTRY,
SHD0,
SHD1
Figure 7-3
TS
Note:
The L3_CLK frequency is programmed by the L3 configuration register core-to-L3 divisor ratio.
See
on page 25
Figure 7-4 on page
The maximum L3_CLK frequency is the core frequency divided by two. Given the high core fre-
quencies available in the PC7457, however, most SRAM designs will be not be able to operate
in this mode using current technology and, as a result, will select a greater core-to-L3 divisor to
provide a longer L3_CLK period for read and write access to the L3 SRAMs. Therefore, the typi-
cal L3_CLK frequency shown in
system. The maximum L3_CLK frequency for any application of the PC7457 will be a function of
the AC timings of the PC7457, the AC timings for the SRAM, bus loading, and printed-circuit
board trace length, and may be greater or less than the value given in
Table 15-1 on page 47
t KHOE
VM = Midpoint Voltage (OV
provides the input/output timing diagram for the PC7457.
provides the potential range of L3_CLK output AC timing specifications as defined in
VM
26.
t AVKH
t IVKH
t KHAV
t KHDV
t KHOV
t KHTSV
t KHARV
for example core and L3 frequencies at various divisors.
Table 7-4
DD
/2)
VM
is considered to be the practical maximum in a typical
t KHTSPZ
t AXKH
t IXKH
t KHAX
t KHDX
t KHOX
t KHTSX
t KHARP
t KHTSV
t KHOZ
t KHARX
VM
t KHARPZ
Table
7-4.
5345D–HIREL–07/06
Table 7-4