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TC6374AF 数据表(PDF) 13 Page - Toshiba Semiconductor |
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TC6374AF 数据表(HTML) 13 Page - Toshiba Semiconductor |
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13 / 125 page  TC6374AF Hardware Datasheet Rev. 1.22 02/2/15 TOTAL 125 PAGE NO. 13 6-3. SD memory card/ MultiMediaCard/ SmartMedia™/ NOR flash memory interface 1 Pin name Pin number I/O Pin function Functional description FD7 - FD4 112-109 B MEDIA DATA BUS The terminal is prepared to connect with media data bus. If clock is stabled after resetting and NOR flash memory is re-written, it takes the upper position of NOR flash memory data bus. In other modes, it takes the upper position of address/data common bus to SmartMedia™. Address and data (including command) are discriminated by FALE and FCLE. The terminal is set to Hi-Z when #CD=“H”(media non-inserted). FD3 - FD0 127-124 B MEDIA DATA BUS The terminal is prepared to connect with media data bus. If clock is stabled after resetting and NOR flash memory is re-written, it takes the lower position of NOR flash memory data bus. In other modes, it takes the lower position of address/data common bus to SmartMedia™. Address and data (including command) are discriminated by FALE and FCLE. When SD Memory Card is used, it is used as 4 bit data bus. If MultiMediaCard is used and SD Memory Card is in the 1 bit mode, FD0 only is used. It is set to Hi-Z when #CD= “H”(media non-inserted). #FCE 106 O SmartMedia™ CHIP ENABLE The terminal indicates the chip enable output signal of SmartMedia™. If #CD=“H”(media not-inserted), it indicates Hi-Z. FCLE/MMC LK 103 O SmartMedia™ COMMAND LATCH ENABLE/SD Memory Card & MultiMediaCar d CLOCK The terminal indicates, if SmartMedia™ is used, the command latch enable output signal to SmartMedia™. If command is outputted to FD bus, it outputs ”H”. If SD Memory Card and MultiMediaCard are used, it indicates 250KHz, 2MHz, 8MHz and16MHz clock output signal to SD Memory Card and MultiMediaCard. Clock output frequency is determined by the maximum operation frequency of media. It is set to “L” when #CD=“H”(media not-inserted). FALE 104 O SmartMedia™ ADDRESS LATCH ENABLE Indicates address latch enable output signal to SmartMedia™. Outputs “H” if address is outputted to FD bus. The terminal is set to “L” if #CD=“H”(media not-inserted). #FRE 107 O SmartMedia™ READ ENABLE Indicates read enable output signal to SmartMedia™. Outputs “L” if address is outputted to FD bus. The terminal is set to “Hi-Z” if #CD=“H”(media not-inserted). #FWE/MM CMD 116 B SmartMedia™ WRITE ENABLE/SD Memory Card & MultiMediaCar d COMMAND Indicates the write enable output signal to SmartMedia™ if used. Outputs “L” if written to FD bus. If SD Memory Card and MultiMediaCard are used, it becomes command/response input/output signal from/to SD Memory Card and MultiMediaCard. The terminal is set to Hi-Z when #CD=“H” (media not inserted). #FBSY 105 I SmartMedia™ BUSY Indicates ready/busy input signal from SmartMedia™. Indicates the busy if ”0” is inputted, or the ready if ”1” is inputted. Connects with the terminal via pull-up resistor from SmartMedia™ ready/busy output. #FWP 117 O SmartMedia™ WRITE PROTECT Indicates write protect output signal to SmartMedia™. Write protection is enabled except for the time when SmartMedia™ is accessed. The terminal is set to “L” if #CD= “H”(media not inserted). |
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