HD6417720BP133BV Renesas Electronics America, HD6417720BP133BV Datasheet - Page 1010

• Manufacturer Part Number: HD6417720BP133BV
• Description: SH3-DSP, WITH USB AND LCDC, PB-F
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417720BP133BV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: FIFO, I²C, IrDA, MMC, SCI, SD, SIO, SIM, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 117
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Data Converters: A/D 4x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 27 A/D Converter
27.7.6
Operating the chip in excess of the following voltage range may result in damage to chip
reliability.
During A/D conversion, the voltages (VANn) input to the analog input pins ANn should be in the
range AV
27.7.7
In designing a board, separate digital circuits and analog circuits. Do not intersect or locate closely
signal lines of a digital circuit and an analog circuit. An analog circuit may malfunction due to
induction, thus affecting A/D conversion values. Separate analog input pins (AN0 to AN3) and the
analog power voltage (AVcc) from digital circuits with analog ground (AVss). Connect analog
ground (AVss) to one point of stable ground (Vss) on the board.
27.7.8
Connect a protective circuit between AVcc and AVss, as shown in figure 27.9, to prevent damage
of analog input pins (AN0 to AN3) due to abnormal voltage such as excessive serge. Connect a
bypass capacitor that is connected to AVcc and a capacitor for a filter that is connected to AN0 to
AN3 to AVss.
When a capacitor for a filter is connected, input currents of AN0 to AN3 are averaged, may
causing errors. If A/D conversion is frequently performed in scan mode, voltages of analog input
pins cause errors when a current that is charged/discharged for capacitance of a sample & hold
circuit in the A/D converter is higher than a current that is input through input impedance (Rin).
Therefore, determine a circuit constant carefully.
Page 950 of 1414
Setting Analog Input Voltage
Notes on Board Design
Notes on Countermeasures to Noise
SS
≤ VANn ≤ AV
CC
(n = 0 to 3).
SH7720 Group, SH7721 Group
R01UH0083EJ0400 Rev. 4.00
Sep 21, 2010