MC68360RC25K Freescale Semiconductor, MC68360RC25K Datasheet - Page 311
MC68360RC25K
Manufacturer Part Number
MC68360RC25K
Description
IC MPU QUICC 25MHZ 241-PGA
Manufacturer
Freescale Semiconductor
Datasheets
1.MC68EN360VR25L.pdf
(14 pages)
2.MC68EN360VR25L.pdf
(2 pages)
3.MC68360AI25L.pdf
(962 pages)
Specifications of MC68360RC25K
Processor Type
M683xx 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
241-PGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Features
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EMWS—External Master Wait State (SRAM Bank Only)
The following bits are used for both DRAM and SRAM memory:
SYNC—Synchronous External Access MC68030-Type
This attribute should be set if an additional wait state is necessary when an asynchronous
external MC68030-type device or external QUICC is accessing SRAM banks (see Table
6-11). This bit is only used if SYNC = 0.
This attribute applies only to an external MC68030-type device or external QUICC that
uses the on-chip memory controller. It determines how the memory controller will assert
its signals in response to what it sees from the external master.
When the SRAM controller is used, CS and DSACK assertion and negation timings are
asynchronous. They are asserted and negated in relation to the external master’s AS line.
The CSNTQ and the TRLXQ attributes are ignored. When EMWS is set, one wait state is
added to the programmed TCYC.
When the DRAM controller is used, CAS and DSACK are negated asynchronously with
the negation of the external master’s AS.
0 = Normal operation.
1 = Insert one additional wait state for external QUICC/MC68030-type masters on their
0 = Asynchronous operation of the memory controller (external MC68030-type master
accesses to all SRAM banks.)
only).
chronous to the QUICC clock. When asynchronous external
masters are using the DRAM controller, the BSTM bit in the
MCR should be cleared.
The DRAM controller’s assertion of RAS and CAS is always syn-
0
1
2
3
4
5
6
15
NOTE: The BSTM bit is located in the MCR of the SI60.
TCYC =
Table 6-11. External MC68030-Type Cycle Length
…
(SRAM Bank in Asynchronous Operation
Freescale Semiconductor, Inc.
For More Information On This Product,
Synchronous Bus Timing
EMWS = 0
External QUICC/MC68030-Type Bus Cycle Length
17
…
3
3
4
5
6
7
8
MC68360 USER’S MANUAL
(BSTM = 1)
Go to: www.freescale.com
EMWS = 1
NOTE
18
…
3
4
5
6
7
8
9
Asynchronous Bus Timing
EMWS = 0
18
…
3
3
5
6
7
8
9
(BSTM = 0)
System Integration Module (SIM60)
EMWS = 1
10
19
…
3
5
6
7
8
9
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