UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 282

• Manufacturer Part Number: UPD78F0034BGC-8BS-A
• Description: MCU 8-Bit 78K0 CISC 32KB Flash 2.5V/3.3V/5V 64-Pin LQFP
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0034BGC-8BS-A

• Package: 64LQFP
• Family Name: 78K0
• Maximum Speed: 12 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 51
• Interface Type: 3-Wire/UART
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

280
(4) Voltage comparator
(5) Series resistor string
(6) ANI0 to ANI7 pins
(7) AV
(8) AV
(9) AV
(10) ADTRG pin
The voltage comparator compares the sampled analog input voltage to the series resistor string output voltage.
The series resistor string is connected between AV
the analog input.
These are eight analog input pins used to input analog signals to undergo A/D conversion to the A/D converter.
ANI0 to ANI7 are alternate-function pins that can also be used for digital input.
Cautions 1. Use ANI0 to ANI7 input voltages within the specification range. If a voltage higher than or
This is the A/D converter reference voltage pin and also the analog power supply pin.
It converts signals input to ANI0 to ANI7 into digital signals according to the voltage applied between AV
AV
Caution
This is the ground potential pin of the A/D converter. Always keep it at the same potential as the V
pin even when not using the A/D converter.
This is the A/D converter analog power supply pin. Always keep it at the same potential as the V
even when not using the A/D converter.
This pin is a pin used to start the A/D converter by hardware.
SS
REF
SS
DD
.
pin
pin
pin
2. Analog input (ANI0 to ANI7) pins are alternate-function pins that can also be used as input
3. When a digital pulse is applied to a pin adjacent to the pin in the process of A/D conversion,
A series resistor string of several tens of k
Therefore, when the output impedance of the reference voltage is too high, it seems as if the
AV
reference voltage error.
CHAPTER 14 10-BIT A/D CONVERTER ( PD780034A, 780034AY SUBSERIES)
equal to AV
rating range), the conversion value of that or equal to channel will be undefined and the
conversion values of other channels may also be affected.
port pins (P10 to P17). When A/D conversion is performed by selecting any one of ANI0
through ANI7, do not access port 1 during conversion, as this may cause a lower conversion
resolution.
A/D conversion values may not be obtained as expected due to coupling noise. Thus, do
not apply a pulse to a pin adjacent to the pin in the process of A/D conversion.
REF
pin and the series resistor string are connected in series. This may cause a greater
REF
or lower than or equal to AV
User’s Manual U14046EJ5V0UD
REF
and AV
SS
is connected between the AV
is applied (even if within the absolute maximum
SS
, and generates the voltage to be compared to
REF
and AV
DD0
or V
SS0
SS
REF
or V
DD1
pins.
and
pin
SS1