UPD78F9212CS-CAB-A Renesas Electronics America, UPD78F9212CS-CAB-A Datasheet - Page 176

• Manufacturer Part Number: UPD78F9212CS-CAB-A
• Description: MCU 8BIT 4KB FLASH 16PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9212CS-CAB-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

(5) ANI0/P20 to ANI3/P23
(6) Input impedance of ANI0 to ANI3 pins
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<1> The analog input pins (ANI0 to ANI3) are also used as I/O port pins (P20 to P23).
<2> If a digital pulse is applied to the pins adjacent to the pins currently used for A/D conversion, the expected
In this A/D converter, the internal sampling capacitor is charged and sampling is performed during sampling time.
Since only the leakage current flows other than during sampling and the current for charging the capacitor also
flows during sampling, the input impedance fluctuates during sampling and other statuses.
If the shortest conversion time of the reference voltage is used, to perform sufficient sampling, it is recommended
to make the output impedance of the analog input source 1 k
to 0.1 F to the ANI0 to ANI3 pins (see Figure 9-19).
When writing the flash memory on-board, supply a stabilized analog voltage to the ANI2 and ANI3 pins, without
attaching a capacitor. Because the communication pulse may change and the communication may fail if a
capacitor is attached to remove noise.
When A/D conversion is performed with any of ANI0 to ANI3 selected, do not access P20 to P23 while
conversion is in progress; otherwise the conversion resolution may be degraded.
value of the A/D conversion may not be obtained due to coupling noise. Therefore, do not apply a pulse to
the pins adjacent to the pin undergoing A/D conversion.
CHAPTER 9 A/D CONVERTER ( PD78F921x ONLY)
User’s Manual U16994EJ6V0UD
or lower, or attach a capacitor of around 0.01 F