参数资料
型号: TMDXBDKFP5515
厂商: Texas Instruments
文件页数: 90/159页
文件大小: 0K
描述: KIT DEV FINGERPRINT C5515
标准包装: 1
传感器类型: 指纹
接口: USB
电源电压: 5V
嵌入式: 是,MCU,16 位
已供物品: 板,扩展板,线缆,迷你型 DVD,传感器
已用 IC / 零件: C5515
产品目录页面: 718 (CN2011-ZH PDF)
其它名称: 296-27452
SPRS645F – AUGUST 2010 – REVISED OCTOBER 2013
Additionally, the SDRAM/mSDRAM interface of EMIF supports placing the SDRAM/mSDRAM in "Self-
Refresh" and "Powerdown Modes". Self-Refresh mode allows the SDRAM/mSDRAM to be put into a low-
power state while still retaining memory contents; since the SDRAM/mSDRAM will continue to refresh
itself even without clocks from the DSP. Powerdown mode achieves even lower power, except the DSP
must periodically wake the SDRAM/mSDRAM up and issue refreshes if data retention is required. To
achieve the lowest power consumption, the SDRAM/mSDRAM interface has configurable slew rate on the
EMIF pins.
The device has limitations to the clock frequency on the EM_SDCLK pin based on the CV DD and
DV DDEMIF .
5.9.3
?
?
?
?
The clock frequency on the EM_SDCLK pin can be configured either as SYSCLK (DSP Operating
Frequency) or SYSCLK/2 via bit 0 of the ECDR Register (0x1C26h)
When CV DD = 1.3 V and DV DDEMIF = 3.3 V, 2.75 V, or 2.5 V, the max clock frequency on the
EM_SDCLK pin is limited to 100 MHz (EM_SDCLK ≤ 100 MHz). Therefore, if SYSCLK ≤ 100 MHz, the
EM_SDCLK can be configured either as SYSCLK or SYSCLK/2, but if SYSCLK > 100 MHz, the
EM_SDCLK must be configured as SYSCLK/2.
When CV DD =1.05 V, and DV DDEMIF = 3.3 V, 2.75 V, or 2.5 V, the max clock frequency on the
EM_SDCLK pin is limited to 60 MHz (EM_SDCLK ≤ 60 MHz). Therefore, if SYSCLK ≤ 60 MHz, the
EM_SDCLK can be configured as either SYSCLK or SYSCLK/2, but if SYSCLK > 60 MHz, the
EM_SDCLK must be configured as SYSCLK/2.
When DV DDEMIF = 1.8 V, regardless of the CV DD voltage, the clock frequency on the EM_SDCLK pin
must be configured as SYSCLK/2 and ≤ 50 MHz.
EMIF Peripheral Register Descriptions
Table 5-11 shows the EMIF registers.
Table 5-11. External Memory Interface (EMIF) Peripheral Registers (1)
HEX ADDRESS
RANGE
1000h
1001h
1004h
1005h
1008h
1009h
100Ch
1010h
1011h
1014h
1015h
1018h
1019h
101Ch
101Dh
1020h
1021h
103Ch
1040h
1044h
1048h
ACRONYM
REV
STATUS
AWCCR1
AWCCR2
SDCR1
SDCR2
SDRCR
ACS2CR1
ACS2CR2
ACS3CR1
ACS3CR2
ACS4CR1
ACS4CR2
ACS5CR1
ACS5CR2
SDTIMR1
SDTIMR2
SDSRETR
EIRR
EIMR
EIMSR
REGISTER NAME
Revision Register
Status Register
Asynchronous Wait Cycle Configuration Register 1
Asynchronous Wait Cycle Configuration Register 2
SDRAM/mSDRAM Configuration Register 1
SDRAM/mSDRAM Configuration Register 2
SDRAM/mSDRAM Refresh Control Register
Asynchronous CS2 Configuration Register 1
Asynchronous CS2 Configuration Register 2
Asynchronous CS3 Configuration Register 1
Asynchronous CS3 Configuration Register 2
Asynchronous CS4 Configuration Register 1
Asynchronous CS4 Configuration Register 2
Asynchronous CS5 Configuration Register 1
Asynchronous CS5 Configuration Register 2
SDRAM/mSDRAM Timing Register 1
SDRAM/mSDRAM Timing Register 2
SDRAM/mSDRAM Self Refresh Exit Timing Register
EMIF Interrupt Raw Register
EMIF Interrupt Mask Register
EMIF Interrupt Mask Set Register
(1)
Before reading or writing to the EMIF registers, be sure to set the BYTEMODE bits to 00b in the EMIF system control register to enable
word accesses to the EMIF registers.
90
Peripheral Information and Electrical Specifications
Product Folder Links: TMS320C5515
Copyright ? 2010–2013, Texas Instruments Incorporated
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