參數(shù)資料
型號(hào)： M37753S4CHP
元件分類(lèi)： 微控制器/微處理器
英文描述： 16-BIT, 40 MHz, MICROCONTROLLER, PQFP80
封裝： PLASTIC, QFP-80
文件頁(yè)數(shù)： 5/112頁(yè)
文件大?。?/td> 1451K
代理商： M37753S4CHP
6. Functional Description
84
EPSON
S1R72V17*** Technical Manual (Rev.1.6)
The transaction execution function of the USB host is turned off after the current
transaction is completed.
Port set to HS mode and to NormalOperation (reset signal SE0 is driven onto the USB cable)
Connection detection, disconnection detection, and remote wakeup detection functions
turned on
Device chirp detection function turned on
Chirp from a device is detected as “HS K” from the downstream port. It is detected by a line
state “K” that continues for 2.5 s or more, and when the line state “K” is terminated within
a specified time after a USB reset is issued, it is detected as normal Chirp. If the state is not
terminated within a specified time, it is detected as erratic Chirp.
The following processes are automatically executed according to the detection result.
(1) When Chirp from a normal device is detected:
Pursuant to completion of Chirp from the device, “HS K” (Chirp K) and “HS J” (Chirp
J) are alternately set out in succession from the host. When the host completes sending
out Chirp, a reset complete status (H_SIE_IntStat_1.ResetCmp) is issued to the firmware.
The port remains in HS mode.
(2) When Chirp from an erratic device is detected:
After certain specified time elapses a device chirp error detected status
(H_SIE_IntStat_0.DetectDevChirpNG) is issued to the firmware. Ensuing operation can
be selected from two operation modes by setting the chirp complete disable
(H_NegoControl_1.DisChirpFinish). For details, refer to Section 6.3.9.3.4.2, “Detection
of Chirp from an Erratic Device.”
(3) When Chirp from a device is not detected and the other connected party is FS:
The port is set to FS mode after issuing a USB reset of a designated duration.
A reset complete status (H_SIE_IntStat_1.ResetCmp) is issued to the firmware.
(4) When the other connected party is LS:
The port is set to LS mode after issuing a USB reset of a designated duration.
A reset complete status (H_SIE_IntStat_1.ResetCmp) is issued to the firmware.
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