參數(shù)資料
型號(hào)： TC6387XB
廠商： Toshiba Corporation
英文描述： SD Memory Card / SDIO Card Controller
中文描述： SD卡/ SDIO卡控制器
文件頁(yè)數(shù)： 39/62頁(yè)
文件大?。?/td> 1406K
代理商： TC6387XB
TC6387XB Specification
Rev. 1.0 02/02/06
TOTAL
62
PAGE NO.39
TOSHIBA CONFIDENTIAL
4.7 SDLED signal
TC6387XB has the SDLED signal for SD interface. This signal is controlled by setting SDLED Control
Register(Offset:13Eh). Before accessing SDLED Control Register(Offset:13Eh), please set following registers.
*Set SDLED Enable Register 1(Config Offset:FAh) to 12h.
*Set SDLED Enable Register 2(Config Offset:FEh) to 80h.
4.8 Clock supply to SD Card
The SDCLK signal is used for a provision of SD Memory Card or SDIO Card. Please refer to the following
setting for enabling the SDCLK output.
(1) Set Stop Clock Control Register (Config Offset:40h) to 1Fh.
(2) Set D0 of SD Software Reset Register (Offset:0E0h) to 1b.
(3) Set D7-0 of SD Card Clock Control Register (Offset:024h). These bits are used for setting the frequency of
SDCLK.
80h : SDCLK=HCLK/512
40h : SDCLK=HCLK/256
20h : SDCLK=HCLK/128
10h : SDCLK=HCLK/64
08h : SDCLK=HCLK/32
04h : SDCLK=HCLK/16
02h : SDCLK=HCLK/8
01h : SDCLK=HCLK/4
00h : SDCLK=HCLK/2
In addition, TC6387XB holds a function that SDCLK can have same frequency as HCLK. In this case, D7-0
settings of SD Card Clock Control Register (Offset:024h)becomes invalid setting.
* Set D0 of Clock Mode Register (Config Offset:42h) to 1b.
* Set D15 of SD Card Clock Control Register (Offset:024h) to 1b.
Please attend that the specification of SDCLK is max.25MHz at the case of SD Card and is max.20MHz at the
case of MultiMedia Card.
(4) D8 of SD Card Clock Control Register (Offset:024h) to 1b.
(5) D8 of Clock & Wait Control Register (Offset:138h) to 1b.
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