MPC8313ECZQADDC Freescale Semiconductor, MPC8313ECZQADDC Datasheet - Page 340
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MPC8313ECZQADDC
Manufacturer Part Number
MPC8313ECZQADDC
Description
Microprocessors - MPU 8313 REV2.2 PB ENC EXT
Manufacturer
Freescale Semiconductor
Datasheet
1.MPC8313CZQADDC.pdf
(1214 pages)
Specifications of MPC8313ECZQADDC
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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e300 Processor Core Overview
7-22
22–23
Bits
17
18
19
20
21
24
DLOCK
ILOCK
Name
DCFI
IFEM
DCE
ICFI
—
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
Data cache enable
0 The data cache is neither accessed nor updated. All pages are accessed as if they were marked
1 The data cache is enabled
Instruction cache lock
0 Normal operation
1 The entire instruction cache is locked (that is, all eight ways of the cache are locked). A locked cache
To prevent locking during a cache access, an isync instruction must precede the setting of ILOCK.
Data cache lock
0 Normal operation
1 The entire data cache is locked (that is, all eight ways of the cache are locked). A locked cache
To prevent locking during a cache access, a sync instruction must precede the setting of DLOCK.
Instruction cache Flash invalidate
0 The instruction cache is not invalidated. The bit is cleared when the invalidation operation begins
1 An invalidate operation is issued that marks the state of each instruction cache block as invalid.
For the e300 core, the proper use of the ICFI and DCFI bits is to set and clear them with two consecutive
mtspr operations.
0 The data cache is not invalidated. The bit is cleared when the invalidation operation begins (usually
1 An invalidate operation is issued that marks the state of each data cache block as invalid without
For the e300 core, the proper use of the ICFI and DCFI bits is to set and clear them with two consecutive
mtspr operations.
Reserved, should be cleared.
Enable M bit on bus for instruction fetches
0 M bit not reflected on bus for instruction fetches. Instruction fetches are treated as nonglobal on the
1 Instruction fetches reflect the M bit from the WIM settings
Data cache Flash invalidate
cache-inhibited (WIM = x1x). Potential cache accesses from the bus (snoop and cache operations)
are ignored. In the disabled state for the L1 caches, the cache tag state bits are ignored and all data
read and write accesses are propagated to the CSB as single-beat transactions. For those
transactions, however, ci reflects the state of the I bit in the MMU for that page regardless of cache
disabled status. DCE is zero at power-up.
supplies data normally on a hit, but the access is treated as a cache-inhibited transaction on a miss.
On a miss, the transaction to the bus is single-beat; however, ci still reflects the state of the I bit in the
MMU for that page independent of cache locked or disabled status.
supplies data normally on a hit, but is treated as a cache-inhibited transaction on a miss. On a miss,
the transaction to the bus is single-beat; however, ci still reflects the state of the I bit in the MMU for
that page independent of cache locked or disabled status. A snoop hit to a locked L1 data cache
performs as if the cache were not locked. A cache block invalidated by a snoop remains invalid until
the cache is unlocked.
(usually the next cycle after the write operation to the register). The instruction cache must be
enabled for the invalidation to occur.
Cache access is blocked during this time. Setting ICFI clears all the valid bits of the blocks and the
PLRU bits to point to way L0 of each set.
the next cycle after the write operation to the register). The data cache must be enabled for the
invalidation to occur.
writing back modified cache blocks to memory. Cache access is blocked during this time. Bus
accesses to the cache are signaled as a miss during invalidate-all operations. Setting DCFI clears all
the valid bits of the blocks and the PLRU bits to point to way L0 of each set.
bus.
Table 7-2. e300 HID0 Bit Descriptions (continued)
Function
Freescale Semiconductor
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