HD64F2676VFC33 Renesas Electronics America, HD64F2676VFC33 Datasheet - Page 811

• Manufacturer Part Number: HD64F2676VFC33
• Description: IC H8S MCU FLASH 256K 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2676VFC33

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 33MHz
• Connectivity: IrDA, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 103
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

16.7
16.7.1
Operation of the A/D converter can be disabled or enabled using the module stop control register.
The initial setting is for operation of the A/D converter to be halted. Register access is enabled by
clearing module stop mode. For details, refer to section 22, Power-Down Modes.
16.7.2
This LSI’s analog input is designed so that conversion precision is guaranteed for an input signal
for which the signal source impedance is 10 k or less. This specification is provided to enable
the A/D converter’s sample-and-hold circuit input capacitance to be charged within the sampling
time; if the sensor output impedance exceeds 10 k , charging may be insufficient and it may not
be possible to guarantee the A/D conversion accuracy. However, if a large capacitance is provided
externally for conversion in single mode, the input load will essentially comprise only the internal
input resistance of 10 k , and the signal source impedance is ignored. However, since a low-pass
filter effect is obtained in this case, it may not be possible to follow an analog signal with a large
differential coefficient (e.g., 5 mV/ s or greater) (see figure 16.6). When converting a high-speed
analog signal or conversion in scan mode, a low-impedance buffer should be inserted.
Sensor input
Usage Notes
Module Stop Mode Setting
Permissible Signal Source Impedance
Sensor output
impedance
Up to 10 k
Low-pass
filter
C to 0.1 F
Figure 16.6 Example of Analog Input Circuit
This LSI
Cin =
15 pF
Rev. 3.00 Mar 17, 2006 page 759 of 926
Equivalent circuit of A/D converter
10 k
Section 16 A/D Converter
REJ09B0283-0300
20 pF