UPD78F1144AGB-GAH-AX Renesas Electronics America, UPD78F1144AGB-GAH-AX Datasheet - Page 840

• Manufacturer Part Number: UPD78F1144AGB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1144AGB-GAH-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 50
• 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 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

838
A/D
converter
Function
Procedure for
Using
Temperature
Sensors.
Operating
current in STOP
mode
Reducing
current when
A/D converter is
stopped
Input range of
ANI0 to ANI7
Conflicting
operations
Noise
countermeasures
ANI0/P20 to
ANI7/P27
Details of
Function
Shift to STOP mode after clearing the A/D converter (by clearing bit 7 (ADCS) of the
A/D converter mode register (ADM) to 0). The operating current can be reduced by
clearing bit 0 (ADCE) of the A/D converter mode register (ADM) to 0 at the same time.
To restart from the standby status, clear bit 0 (ADIF) of interrupt request flag register
1L (IF1L) to 0 and start operation.
Use the result of the second or later A/D conversion for temperature sensor 0 (ANI0
side), and the result of the third or later A/D conversion for temperature sensor 1
(ANI1 side).
Be sure that the voltage to be applied to AV
stated in Table 10-1.
If bit 7 (ADCS) and bit 0 (ADCE) of the A/D converter mode register (ADM) are set to
0, the current will not be increased by the A/D converter even if a voltage is applied
to AV
that supplies a voltage to AV
in Figure 10-25, AV
reduced by satisfying the following conditions (see the main text).
Observe the rated range of the ANI0 to ANI7 input voltage. If a voltage of AV
higher and AV
an analog input channel, the converted value of that channel becomes undefined. In
addition, the converted values of the other channels may also be affected.
Conflict between A/D conversion result register (ADCR, ADCRH) write and ADCR or
ADCRH read by instruction upon the end of conversion
ADCR or ADCRH read has priority. After the read operation, the new conversion
result is written to ADCR or ADCRH.
Conflict between ADCR or ADCRH write and A/D converter mode register (ADM)
write, analog input channel specification register (ADS), or A/D port configuration
register (ADPC) write upon the end of conversion
ADM, ADS, or ADPC write has priority. ADCR or ADCRH write is not performed, nor
is the conversion end interrupt signal (INTAD) generated.
To maintain the 10-bit resolution, attention must be paid to noise input to the AV
pin and pins ANI0 to ANI7.
<1> Connect a capacitor with a low equivalent resistance and a good frequency
<2> The higher the output impedance of the analog input source, the greater the
<3> Do not switch these pins with other pins during conversion.
<4> The accuracy is improved if the HALT mode is set immediately after the start of
The analog input pins (ANI0 to ANI7) are also used as input port pins (P20 to P27).
When A/D conversion is performed with any of ANI0 to ANI7 selected, do not access
P20 to P27 while conversion is in progress; otherwise the conversion resolution may
be degraded. It is recommended to select pins used as P20 to P27 starting with the
ANI0/P20 that is the furthest from AV
If a digital pulse is applied to the pins adjacent to the pins currently used for A/D
conversion, the expected 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.
response to the power supply.
influence. To reduce the noise, connecting external C as shown in Figure 10-26
is recommended.
conversion.
REF
APPENDIX B LIST OF CAUTIONS
, while the A/D converter is stopped. If a current flows from the power supply
User’s Manual U17854EJ9V0UD
SS
or lower (even in the range of absolute maximum ratings) is input to
REF
= 0 V = AV
REF
to an external circuit of the microcontroller as shown
SS
can be achieved and the external current can be
REF
Cautions
REF
normally satisfies the conditions
REF
REF
or
p. 325
p.328
p.328
p.329
p.329
p.329
p.329
p.330
p.330
(14/33)
Page