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參數(shù)資料
| 型號(hào)： | M34506E4FP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, OTPROM, MICROCONTROLLER, PDSO20 |
| 封裝： | 5.30 X 12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20 |
| 文件頁(yè)數(shù)： | 58/114頁(yè) |
| 文件大?。?/td> | 937K |
| 代理商： | M34506E4FP |
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Rev.2.00
Aug 28, 2006
page 44 of 119
7643 Group
REJ03B0054-0200
USB Interrupts
The USB FCU has USB Function Interrupt.
qUSB Function Interrupt (USBF-INT)
The USBF-INT is usable for the USB data flow control and power
management. The USBF-INT request occurs at data transmit/re-
ceive completion, overrun/underrun, reset, or receiving suspend/
resume signal. To enable this interrupt, the USB function interrupt
enable bit in the interrupt control register A (address 000516) and
the respective bit in the USB interrupt enable registers 1 and 2
(addresses 0005416 and 0005516) must be set to “1”. When set-
ting bit 7 in USB interrupt enable register 2 to “1”, the suspend
interrupt and the resume interrupt are enabled.
Endpoint x (x = 0 to 2) IN interrupt request occurs when the USB
Endpoint x IN interrupt status flag (INTST 0, 2, 4) of USB interrupt
status registers 1 and 2 (addresses 005216 and 005316) is “1”. The
USB Endpoint x IN interrupt status flag is set to “1” when the re-
spective endpoint IN_PKT_RDY bit is “1”.
Endpoint x (x = 0 to 2) OUT interrupt request occurs when the
USB endpoint x OUT interrupt status flag (INTST3, 5) in USB in-
terrupt status registers 1 and 2 is set to “1”. The USB Endpoint x
OUT interrupt status flag is set to “1” when the respective endpoint
OUT_PKT_RDY flag is “1”.
The USB reset interrupt request occurs when the USB reset inter-
rupt status flag (INTST13) in USB interrupt status register 2 is set
to “1”. This flag is set when the SE0 is detected on the D+/D- line
for at least 2.5
s. When this situation happens, all USB internal
registers (addresses 005016 to 005F16), except this flag, are ini-
tialized to the default state at reset. The USB reset interrupt is
always enabled.
The suspend/resume interrupt request occurs when either the
USB resume signal interrupt status flag (INTST14) or the USB
suspend signal interrupt status flag (INTST15) in USB interrupt
status register 2 is set to “1”.
The bits in both interrupt status registers 1 and 2 can be cleared
by writing “1” to each bit.
Suspend/Resume Functions
If no bus activity is detected on the D+/D- line for at least 3 ms, the
USB suspend signal detect flag (SUSPEND) of the USB power
control register (address 005116) and the USB suspend signal in-
terrupt status flag of USB interrupt status register 2 are set to “1”
and the suspend interrupt request occurs. The following procedure
must be executed after pushing the internal registers (A, X, Y ) to
memories during the suspend interrupt process routine.
(1) Clear all bits of USB interrupt status register 1 (address
005216) and USB interrupt status register 2 (address 005316)
to “0”.
(2) Set the USB clock enable bit to “0”. (After disabling the USB
clock, do not write to any of the USB internal registers (ad-
dresses 005016 to 006216), except for the USB control register
(address 001316), clock control register (address 001F16), and
frequency synthesizer control register (address 006C16).
(3) Set the frequency synthesizer enable bit to “0”.
(4) Set the USB line driver current control bit to “1”. (Always keep
the USB line driver current control bit set to “0” during USB
function operations. When operating at Vcc = 3.3 V, this bit
does not need to be set.)
(5) Keep total drive current at 500
A or less.
(6) Disable the timer 1 interrupt.
(7) Disable the timer 2 interrupt. (Disable all the other external in-
terrupts.)
(8) Set the timer 1 interrupt request bit to “0”.
(9) Set the timer 2 interrupt request bit to “0”.
(10) Set the interrupt disable flag (I) to “0”.
(11) Execute the STP instruction.
At this point, the MCU will be in stop mode (suspend mode). Be-
fore executing the STP instruction, make sure to set the USB
function interrupt request bit (bit 0 at address 000216) to “0” and
the USB function interrupt enable bit (bit 0 at address 000516) to
“1”.
The USB suspend detect signal flag goes to “0” when the USB re-
sume signal detect flag (RESUME) is set to “1”. During suspend
mode, if the clock operation is started up with a process (remote
wake-up) other than the resume interrupt process (for example;
reset or timer), make sure to clear the USB suspend detect signal
flag to “0” when you set the USB remote wake-up bit to “1”. When
the USB FCU is in suspend mode and detects a non-idle signal on
the D+/D- line, the USB resume detect flag and the USB resume
signal interrupt status flag both go to “1” and a resume interrupt
request occurs. At this point, pull the internal registers (A, X, Y) in
this interrupt process routine. Take the following procedure in the
USB resume interrupt process.
(1) Set the USB line driver current control bit to “0”. (When operat-
ing at Vcc = 3.3 V, this bit does not need to be set.)
(2) Set the frequency synthesizer enable bit to “1” and set a 2 ms
wait or more .
(3) Check the frequency synthesizer lock status bit. If “0”, it must
be checked again after a 0.1 ms wait.
(4) Set the USB clock enable bit to “1”.
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| M34508G4H-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34506M2 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34506M2-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES |
| M34506M4 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34506M4-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES |
| M34507E4FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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