HD6417705F133BV Renesas Electronics America, HD6417705F133BV Datasheet - Page 518

• Manufacturer Part Number: HD6417705F133BV
• Description: MPU 3V 0K PB-FREE 208 FP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417705F133BV

• Core Processor: SH-3
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: EBI/EMI, FIFO, IrDA, SCI, USB
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 105
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 208-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

18.8
1. USB Transceiver
2. D+ Pull-Up Control
3. Detection of USB Cable Connection/Disconnection
Rev. 2.00, 09/03, page 470 of 690
A USB transceiver IC (such as a PDIUSBP11) should be connected externally when no
internal transceiver is used. The USB transceiver manufacturer should be consulted concerning
the recommended circuit from the USB transceiver to the USB connector, etc.
In a system where it is wished to disable USB host/hub connection notification (D+ pull-up)
(during high-priority processing or initialization processing, for example), D+ pull-up should
be controlled using a general output port. However, if a USB cable is already connected to the
host/hub and D+ pull-up is prohibited, D+ and D– will both go low (both of D+ and D– pulled
down on the host/hub side) and the USB module will mistakenly identify this as reception of a
USB bus reset from the host. Therefore, the D+ pull-up control signal and VBUS pin input
signal should be controlled using a general output port and the USB cable VBUS (AND
circuit) as shown in figure 18.17. (The UDC core in this LSI maintains the powered state when
the VBUS pin is low, regardless of the D+/D– state.)
As USB states, etc., are managed by hardware in this module, a VBUS signal that recognizes
connection/disconnection is necessary. The power supply signal (VBUS) in the USB cable is
used for this purpose. However, if the cable is connected to the USB host/hub when the
function (system installing this LSI) power is off, a voltage (5 V) will be applied from the USB
host/hub. Therefore, an IC (such as an HD74LV1G08A or 2G08A) that allows voltage
application when the system power is off should be connected externally.
Example of USB External Circuitry