7643 datasheet(265/424 Pages) RENESAS

265 / 424 page

Rev.2.00

Aug 28, 2006

page 144 of 202

7643 Group

REJ09B0133-0200

APPLICATION

2.6 USB

Fig. 2.6.39 Register setting (USB suspend interrupt)

USB suspend signal interrupt status flag

USB interrupt status register 2 (Address : 5316)

USBIS2

USB control register (Address : 1316)

USBC

Frequency synthesizer control register (Address : 6C16)

FSC

Timer 1 interrupt : enabled

Timer 2 interrupt : enabled

Interrupt control register B (Address : 0616)

ICONB

Timer 1 interrupt request bit

Timer 2 interrupt request bit

Interrupt request register B (Address : 0316)

IREQB

0 0

Note: When using the MCU in Vcc = 3 V, clear bit 4 of USBC to “0” and

disable the built-in DC-DC converter.

Frequency synthesizer : disabled

(Set this to be enabled when returning from suspend state)

USB line driver current control : Low

(Set USB line driver current to High when returning from suspend state)

USB line driver : enabled (Note)

USB clock disabled

USB function control unit : enabled

(6)

Application example 6: USB suspend interrupt

Outline: Execute the suspend mode process routine when the USB suspend signal interrupt status

flag is “1” in the USB function interrupt routine.

Set the USB function interrupt enable bit and the USB suspend/resume interrupt enable

bit to “1” (enabled).

Before executing the STP instruction, clear all bits of USB interrupt status registers 1 and

In addition, when an interrupt process is not used to transition to the suspend mode, be

sure to set the USB function interrupt enable bit to “1” and clear the USB function

interrupt request bit to “0” before executing the STP instruction.

Figure 2.6.39 shows the related register settings and Figure 2.6.40 shows a control procedure

example.

7643 Datasheet(PDF) 265 Page - Renesas Technology Corp

7643 Datasheet(HTML) 265 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL