
Signal Descriptions
2-12
Freescale Semiconductor
2.3.5
SDRAM Controller Signals
describes signals that are used for SDRAM accesses.
2.3.6
External Interrupt Signals
describes the external interrupt signals.
2.3.7
DMA Signals
describes the external DMA signals.
Table 2-7. SDRAM Controller Signals
Signal Name
Abbreviation
Function
I/O
SDRAM A10
SD_A10
Bit 10 of the SDRAM Address bus
O
SDRAM Clock Enable
SD_CKE
SDRAM clock enable.
O
DDR SDRAM Clock
SD_CLK
Output clock for DDR SDRAM.
O
DDR SDRAM Clock
SD_CLK
Inverted output clock for DDR SDRAM.
O
SDRAM Chip Selects
SD_CS[1:0]
SDRAM chip select signals.
O
DDR SDRAM Data Strobes SD_DQS[3:2]
Indicates when valid data is on the data bus. SD_DQS1 is tied to
SD_DQS3 and SD_DQS0 is tied to SD_DQS2 internally.
I/O
SDR SDRAM Write Data
Byte Mask
SD_DQM[3:0]
Used to determine which byte lanes of the data bus should be latched
during a write cycle. These pins are multiplexed with the BE/BWEn
pins.
The SD_DQMn should be connected to individual SDRAM DQM
signals. Most SDRAMs associate DQM3 with the MSB, in which case
SD_DQM3 should be connected to the SDRAM's DQM3 input.
O
SDRAM Synchronous
Column Address Strobe
SD_SCAS
SDRAM synchronous column address strobe.
O
SDRAM Synchronous Row
Address Strobe
SD_SRAS
SDRAM synchronous row address strobe.
O
SDR SDRAM Data Strobe
SD_SDRDQS
Generated by the memory controller in SDR mode, to mimic the DQS
generated by DDR memories during reads. It is routed out and
connected back to SD_DQS inputs.
O
SDRAM Write Enable
SD_WE
Indicates the direction of the data transfer on the bus for SDRAM
accesses. A logic 1 indicates a read from a slave device and a logic 0
indicates a write to a slave device.
O
Table 2-8. External Interrupt Signals
Signal Name
Abbreviation
Function
I/O
External Interrupts
IRQ[7:1]
External interrupt sources.
I
MCF5329 Reference Manual, Rev 3
Содержание MCF5329
Страница 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 126: ...Enhanced Multiply Accumulate Unit EMAC 4 20 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 564: ...Liquid Crystal Display Controller LCDC 22 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 692: ...Programmable Interrupt Timers PIT0 PIT3 28 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 720: ...Queued Serial Peripheral Interface QSPI 30 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 790: ...Message Digest Hardware Accelerator MDHA 33 20 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 902: ...Register Memory Map Quick Reference A 26 Freescale Semiconductor MCF5329 Reference Manual Rev 3...