HD6417720BP133BV Renesas Electronics America, HD6417720BP133BV Datasheet - Page 1009

• 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: -

SH7720 Group, SH7721 Group
27.7.4
For the analog input design of this LSI, conversion accuracy is guaranteed for an input signal with
signal-source impedance of 5 kΩ or less. The specification is for charging input capacitance of the
sample and hold circuit of the A/D converter within sampling time. When the output impedance of
the sensor exceeds 5 kΩ, conversion accuracy is not guaranteed due to insufficient charging. If
large external capacitance is set at conversion in single mode, signal-source impedance is ignored
since input load is only internal input resistance of 3 kΩ. However, an analog signal with large
differential coefficient (5 mV/μs or greater) cannot be followed up because of a low-pass filter
(figure 27.8). When converting high-speed analog signals or converting in scan mode, insert a
low-impedance buffer.
27.7.5
By adding capacitance, absolute accuracy may be degraded if noise is on GND because there is
coupling with GND. Therefore, connect electrically stable GND such as AVss to prevent absolute
accuracy from being degraded.
A filter circuit must not interfere with digital signals, or must not be an antenna on a mounting
board.
R01UH0083EJ0400 Rev. 4.00
Sep 21, 2010
Allowable Signal-Source Impedance
Influence to Absolute Accuracy
Sensor input
Output impedance of sensor
Lowpass
filter
(C = 0.1μF)
to 5 kΩ
Figure 27.8 Analog Input Circuit Example
This LSI
C
15 pF
in
=
Equivalent circuit
of A/D converter
3 kΩ
20 pF
Section 27 A/D Converter
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