SRAM
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
14-3
3. The ECC is then calculated on the resulting 64 bits formed in the previous step.
4. The 8-bit ECC result is appended to the 64 bits from the data bus, and the 72-bit value is then
written to SRAM.
14.6.1
Access Timing
The system bus is a two-stage pipelined bus, which makes the timing of any access dependent on the access
during the previous clock.
lists the various combinations of read and write operations to SRAM
and the number of wait states used for the each operation. The table columns contain the following
information:
Current operation
Lists the type of SRAM operation executing currently
Previous operation Lists the valid types of SRAM operations that can precede the current SRAM
operation (valid operation during the preceding clock)
Wait states
Lists the number of wait states (bus clocks) the operation requires which depends
on the combination of the current and previous operation
Table 14-3. Number of Wait States Required for SRAM Operations
Current Operation
Previous Operation
Number of Wait States Required
Read Operation
Read
Idle
1
Pipelined read
Burst read
64-bit write
2
8-, 16-, or 32-bit write
0
(read from the same address)
1
(read from a different address)
Pipelined read
Read
0
Burst read
Idle
1,0,0,0
Pipelined read
Burst read
64-bit write
2,0,0,0
8-, 16-, or 32-bit write
0,0,0,0
(read from the same address)
1,0,0,0
(read from a different address)
Содержание MPC5565
Страница 18: ...MPC5565 Microcontroller Reference Manual Devices Supported MPC5565 MPC5565 RM Rev 1 0 09 2007...
Страница 34: ...MPC5565 Reference Manual Rev 1 0 Freescale Semiconductor 15...
Страница 35: ...MPC5565 Reference Manual Rev 1 0 16 Freescale Semiconductor...
Страница 325: ...Error Correction Status Module ECSM MPC5565 Microcontroller Reference Manual Rev 1 0 8 16 Freescale Semiconductor...
Страница 515: ...External Bus Interface EBI MPC5565 Microcontroller Reference Manual Rev 1 0 12 70 Freescale Semiconductor...
Страница 553: ...Flash Memory MPC5565 Microcontroller Reference Manual Rev 1 0 13 38 Freescale Semiconductor...
Страница 559: ...SRAM MPC5565 Microcontroller Reference Manual Rev 1 0 14 6 Freescale Semiconductor...
Страница 577: ...Boot Assist Module BAM MPC5565 Microcontroller Reference Manual Rev 1 0 15 18 Freescale Semiconductor...
Страница 895: ...Deserial Serial Peripheral Interface DSPI MPC5565 Microcontroller Reference Manual Rev 1 0 19 72 Freescale Semiconductor...
Страница 973: ...Preface MPC5565 Microcontroller Reference Manual Rev 1 0 21 36 Freescale Semiconductor...
Страница 1145: ...MPC5565 Register Map MPC5565 Microcontroller Reference Manual Rev 1 0 A 60 Freescale Semiconductor...
Страница 1153: ...Calibration MPC5565 Microcontroller Reference Manual Rev 1 0 B 8 Freescale Semiconductor...