参数资料
型号: HB28H016RM2
英文描述: IC Memory CompactFlash /PC-ATA Standard Users Manual/Device
中文描述: 集成电路记忆的CompactFlash / PC的ATA标准用户手册/设备
文件页数: 59/103页
文件大小: 466K
代理商: HB28H016RM2
53
4.1.1
Switching between True-IDE and PC-ATA Specifications
Switching between True-IDE and PC-ATA specifications is performed at power-on.
Once the card starts up in a particular mode, the mode can only be switched by powering on again.
The mode cannot be switched by means of a hardware or software reset.
Mode switching is performed by confirming the
ATASEL
(OE pin) potential.
ATASEL
(OE pin)
checking is only performed at power-on.
Table 4.1 shows the relationship between the
ATASEL
potential referenced at power-on and
switching between PC-ATA specifications and True-IDE specifications.
Table 4.1
Mode Switching
No.
Mode
ATASEL
Potential
Notes
Subsequently operates as
OE
1
PC-ATA
H
2
Note:
True-IDE
If the
ATASEL
potential is set to the low level on the host side at power-on, but the card
identifies a high level due to noise, etc., the card will start up in PC-ATA mode. Adequate
noise prevention measures are therefore required for this pin.
L
Subsequently must constantly be held low
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