Instruction manual

R8A66597 USB Evaluation Board R0K866597D020BR

Hardware Instruction Manual

R19AN0005EJ0100 Rev.1.00 Page 22 of 26

Jan 10, 2012

(1) The receptacle of the target board should suit the size of this board (refer to Figure 3 and Figure 4). Make pin

arrangement the same as this board (refer to Table 1 and Table 2). Please refer to Appendix 1: the

R0K866597D020BR Part List and Appendix 2: the Circuit Diagram, when selecting connector and pin

arrangement. The HKP-50FD2 from Honda Tsushin Kogyo is applicable to the target board.

(2) The R8A66597FP generates a core power 1.5V from VCC 3.3V. An internal regulator makes 1.5V from 3.3V

through the #19-pin and #20-pin of CN3 and outputs 1.5V to VDD pin. On the R0K866597D020BR, 4.7uF and

0.1uF capacitors are mounted as smoothing capacitors for VDD.

(3) The interface power supply VIF is 1.8V or 3.3V.

(a) Short JP4 to “EXIOVcc” and supply 1.8V by the #25-pin and #26-pin of CN2 , when VIF is 1.8V.

(b) Short JP4 to “3.3V”, when VIF is 3.3V. In this case, power supply to VIF is the same as VCC.

(4) Use SD0-SD7 of CN2 when using split bus for DMA. SD0-SD7 can be used also as a general-purpose port.

(5) Processing for unused pin : Please refer to the R8A66597 datasheet, USB2.0 Dual Function Controller

R8A66597FP/DFP, for details.

VBUS circuit

Note: When the peripheral device connected to the USB connector is in an unusual state due to a short circuit, or

an over current causes an over current in VBUS, the over current protection circuit of a USB power switch

IC turns on, and it turns the VBUS power supply off. But after turning off, current around 0.4A continues

flowing, and the USB power switch IC runs hot. Remove the unusual state promptly for the sake of safety.

To start/stop supply VBUS to the peripheral device, the MCU should operate the R8A66597 to turn on/off

the VBUS output of the USB power switch IC (U2). When the USB power switch IC detects over current, it

outputs a low pulse to the FLG output pin connected to the R8A66597FP, and it issues an interrupt to MCU

to notice the over current state. Monitor the FLG output pin status and turn off the VBUS output when the

over current state is detected by the R8A66597 control software.

Confirm that the USB device is in usual state before connecting.

(1) To supply 5V to VBUS of CN1:

(a) Apply 5V to CN4.

(b) Set JP6 to “HOST”.

(2) To supply 5V to VBUS of CN5

(a) Apply 5V to CN4.

(b) Output high signal from VBOUT1-pin by a R8A66597 control software.

Note: When the R8A66597 control software turn off VBUS supply from the USB power switch IC, VBUS is not

shutdown immediately but slowly because of 150uF capacitor.

8.3 Using R0K866597D020BR as a peripheral

When the R0K866597D020BR is operated as a peripheral controller, please pay attention to following notes:

(1) Set JP6 to "PERI"

(2) Connect a USB host, such as a PC to CN1

(3) To connect a USB host to CN1, an adapter is needed to convert the A-plug into the B-receptacle.

(4) CN5 is not available as a peripheral.