參數(shù)資料
型號： CY7C63742-SC
廠商： CYPRESS SEMICONDUCTOR CORP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 12 MHz, RISC MICROCONTROLLER, PDSO24
封裝： 0.300 INCH, PLASTIC, SOIC-24
文件頁數(shù)： 31/48頁
文件大?。?/td> 425K
代理商： CY7C63742-SC
PRELIMINARY
FO R
enCoRe USB CY7C63722/23
CY7C63742/43
37
21.3.7
Wake-up Interrupt
The internal wake-up timer can be used to wake the part from suspend mode (although it can also provide an interrupt when the
part is awake). The wake-up timer is cleared whenever the wake-up interrupt enable bit (Register 0x20) is written to a 0, and runs
whenever that bit is written to a 1. When the interrupt is enabled, the wake-up timer provides periodic interrupts with period tWAKE.
The wake-up time can be adjusted by firmware as explained in Section 11.2.
22.0
USB Mode Tables
The following tables give details on mode setting for the USB Serial Interface Engine.
Note:
3.
STALL bit is the bit 7 of the USB Non-Control Device Endpoint Mode registers. Refer to Section 14.3 for more explanation.
The ‘In’ column represents the SIE’s response to the token type.
A disabled endpoint will remain disabled until changed by firmware, and all endpoints reset to the disabled state.
Any SETUP packet to an enabled endpoint with mode set to accept SETUPs will be changed by the SIE to 0001 (NAKing). Any
mode set to accept a SETUP will ACK a valid SETUP transaction.
Most modes that control transactions involving an ending ACK will be changed by the SIE to a corresponding mode which NAKs
subsequent packets following the ACK. Exceptions are modes 1010 and 1110.
A Control endpoint has three extra status bits for PID (Setup, In and Out), but must be placed in the correct mode to function as
such. Non-Control endpoints should not be placed into modes that accept SETUPs.
A ‘check’ on an Out token during a Status transaction checks to see that the Out is of zero length and has a Data Toggle (DTOG)
of 1.
Table 22-1. USB Register Mode Encoding
Mode
Encoding
Setup
In
Out
Comments
Disable
0000
ignore
Ignore all USB traffic to this endpoint
Nak In/Out
0001
accept
NAK
Forced from Setup on Control endpoint, from modes other
than 0000
Status Out Only
0010
accept
stall
check
For Control endpoints
Stall In/Out
0011
accept
stall
For Control endpoints
Ignore In/Out
0100
accept
ignore
For Control endpoints
Reserved
0101
ignore
always
Not Complaint or Low-speed device
Status In Only
0110
accept
TX 0
stall
For Control Endpoints
Reserved
0111
ignore
TX cnt
ignore
Not Complaint or Low-speed device
Nak Out
1000
ignore
NAK
An ACK from mode 1001 --> 1000
Ack [3]=0)
Ack Out(STALL[3]=1)
1001
ignore
ACK
stall
This mode is changed by SIE on issuance of ACK --> 1000
Nak Out - Status In
1010
accept
TX 0
NAK
An ACK from mode 1011 --> 1010
Ack Out - NAK In
1011
accept
NAK
ACK
This mode is changed by SIE on issuance of ACK --> 0001
Nak In
1100
ignore
NAK
ignore
An ACK from mode 1101 --> 1100
Ack IN(STALL[3]=0)
Ack IN(STALL[3]=1)
1101
ignore
TX cnt
stall
ignore
This mode is changed by SIE on issuance of ACK --> 1100
Nak In - Status Out
1110
accept
NAK
check
An ACK from mode 1111 --> 111 Ack In - Status Out
Ack In - Status Out
1111
accept
TX cnt
check
This mode is changed by SIE on issuance of ACK -->1110
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