参数资料
型号: MC9328MXLVH15
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 150 MHz, RISC PROCESSOR, PBGA256
封装: 14 X 14 MM, 1.30 MM HEIGHT, 0.80 MM PITCH, MAPBGA-256
文件页数: 51/89页
文件大小: 1869K
代理商: MC9328MXLVH15
Specifications
MOTOROLA
MC9328MXL Advance Information
55
3.11.2 SDIO-IRQ and ReadWait Service Handling
In SDIO, there is a 1-bit or 4-bit interrupt response from the SDIO peripheral card. In 1-bit mode, the
interrupt response is simply that the SD_DAT[1] line is held low. The SD_DAT[1] line is not used as data
in this mode. The memory controller generates an interrupt according to this low and the system interrupt
continues until the source is removed (SD_DAT[1] returns to its high level).
In 4-bit mode, the interrupt is less simple. The interrupt triggers at a particular period called the "Interrupt
Period" during the data access, and the controller must sample SD_DAT[1] during this short period to
determine the IRQ status of the attached card. The interrupt period only happens at the boundary of each
block (512 bytes).
Table 19. Timing Values for Figure 39 through Figure 43
Parameter
Symbol
Minimum
Maximum
Unit
Parameter
MMC/SD bus clock, CLK (All values are referred to minimum (VIH) and maximum
(VIL)
MMC/SD bus clock, CLK
(All values are referred to
minimum (VIH) and
maximum (VIL)
Command response cycle
NCR
2
64
Clock
cycles
Command response cycle
Identification response
cycle
NID
5
Clock
cycles
Identification response
cycle
Access time delay cycle
NAC
2
TAAC + NSAC
Clock
cycles
Access time delay cycle
Command read cycle
NRC
8
Clock
cycles
Command read cycle
Command-command
cycle
NCC
8
Clock
cycles
Command-command cycle
Command write cycle
NWR
2
Clock
cycles
Command write cycle
Stop transmission cycle
NST
2
Clock
cycles
Stop transmission cycle
TAAC: Data read access time -1 defined in CSD register bit[119:112]
NSAC: Data read access time -2 in CLK cycles (NSAC100) defined in CSD register
bit[111:104]
TAAC: Data read access
time -1 defined in CSD
register bit[119:112]
NSAC: Data read access
time -2 in CLK cycles
(NSAC100) defined in
CSD register bit[111:104]
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