UPD78F1174AGF-GAT-AX Renesas Electronics America, UPD78F1174AGF-GAT-AX Datasheet - Page 401

• Manufacturer Part Number: UPD78F1174AGF-GAT-AX
• Description: MCU 16BIT 78K0R/KX3 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1174AGF-GAT-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, EBI/EMI, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(6) ANI0/P20 to ANI7/P27 and ANI8/P150 to ANI15/P157
(7) Input impedance of ANI0 to ANI15 pins
(8) AV
<1> The analog input pins (ANI0 to ANI7) are also used as input port pins (P20 to P27).
<2> If a digital pulse is applied to the pins adjacent to the pins currently used for A/D conversion, the expected
This A/D converter charges a sampling capacitor for sampling during sampling time.
Therefore, only a leakage current flows when sampling is not in progress, and a current that charges the
capacitor flows during sampling. Consequently, the input impedance fluctuates depending on whether sampling
is in progress, and on the other states.
To make sure that sampling is effective, however, it is recommended to keep the output impedance of the analog
input source to within 10 kΩ, and to connect a capacitor of about 100 pF to the ANI0 to ANI15 pins (see Figure
11-26).
A series resistor string of several tens of kΩ is connected between the AV
Therefore, if the output impedance of the reference voltage source is high, this will result in a series connection to
the series resistor string between the AV
REF0
The analog input pins (ANI8 to ANI15) are also used as input port pins (P150 to P157).
When A/D conversion is performed with any of ANI0 to ANI15 selected, do not access P20 to P27 and
P150 to P157 while conversion is in progress; otherwise the conversion resolution may be degraded. It is
recommended to select pins used as P20 to P27 and P150 to P157 starting with the ANI0/P20 that is the
furthest from AV
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.
pin input impedance
REF0
.
CHAPTER 11 A/D CONVERTER
REF0
User’s Manual U18432EJ5V0UD
and AV
SS
pins, resulting in a large reference voltage error.
REF0
and AV
SS
pins.
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