參數(shù)資料
型號: ZR36506
英文描述: Fast Recovery Rectifier Diodes
中文描述: 外圍芯片
文件頁數(shù): 82/99頁
文件大?。?/td> 452K
代理商: ZR36506
Zoran ZR36506 USBV ision – Datasheet
Zoran Proprietary and Confidential
12 -2
ZR36506 USB and Status Registers
Parameter
Register
Address
Usage
EE_CLK_FORCE
[2..0]
Reg.16/d7-d5
EE_CONT
Read Only register.
These 3 bits reflect the logical level of the
following pins of the ZR36506:
EE_CLK_FORCE [0] = SCL/PWR0 pin.
EE_CLK_FORCE [1] = PWR1 pin.
EE_CLK_FORCE [2] = SDA pin.
WD_EN &
WD_COUNT[7..0]
Reg.0/d0
Reg.53/d7-d0
Some USB host controllers may start an
Isochronous IN transaction too long after the
SOF (Start of USB Frame point). This means
that long IN transactions may exceed the
1 mS time interval of the USB frame, and
cause the USB host controller to disconnect
the device. The ZR36506 uses an internal
Watch Dog timer to eliminate such problems.
The Watch Dog operates if the WD_EN
control bit is set to '1'. It then starts to count
686 uS after the SOF pattern, and terminates
any Isochronous transaction automatically
when reaching the value of the WD_COUNT
register. Every one count is equivalent to
1.33 uS. Note that the value of WD_COUNT
should be no more than 0xE9 in order to take
any effect.
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