MPC8313EZQADDC Freescale Semiconductor, MPC8313EZQADDC Datasheet - Page 538
MPC8313EZQADDC
Manufacturer Part Number
MPC8313EZQADDC
Description
Microprocessors - MPU 8313 REV2.2 PB W/ENC
Manufacturer
Freescale Semiconductor
Datasheet
1.MPC8313CZQADDC.pdf
(1214 pages)
Specifications of MPC8313EZQADDC
Processor Series
MPC8313E
Core
e300
Data Bus Width
16 bit
Maximum Clock Frequency
133 MHz
Program Memory Size
16 KB
Data Ram Size
16 KB
Interface Type
I2C
Mounting Style
SMD/SMT
Package / Case
PBGA
Number Of Programmable I/os
32
Number Of Timers
4
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Enhanced Local Bus Controller
10.5.1.5
In case a system contains a memory hierarchy with high speed synchronous memories (synchronous
SRAM) and lower speed asynchronous memories (for example, FLASH EPROM and peripherals) the
GPCM-controlled memories should be decoupled by buffers to reduce capacitive loading on the bus.
Those buffers have to be taken into account for the timing calculations.
To calculate address setup timing for a slower peripheral/memory device, several parameters have to be
added: propagation delay for the address latch, propagation delay for the buffer and the address setup for
the actual peripheral. Typical values for the two propagation delays are in the order of 3–6 ns, so for a
133-MHz bus frequency, LCS should arrive on the order of 3 bus clocks later.
For data timings, only the propagation delay of one buffer plus the actual data setup time has to be
considered.
10-90
Local Bus Interface
GPCM Timings
Local Bus Interface
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
Figure 10-71. Local Bus Peripheral Hierarchy for High Bus Speeds
LBCTL
LAD[0:15]
LAD n
LALE
LBCTL
LA n
LALE
Figure 10-72. GPCM Address Timings
Muxed Address/Data
Unmuxed Address
Buffered Data
Latch
A/D
LE
DIR
Latch
A
Q
B
Buffer
Muxed Address/Data
Unmuxed Address
Buffered Address
A
DQ
MA
A
Peripherals
Device
Memories
Input
Pin
Slower
and
A
DQ
Peripherals
SSRAM
Memories
Slower
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