UPD78F1144AGB-GAH-AX Renesas Electronics America, UPD78F1144AGB-GAH-AX Datasheet - Page 330

• 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: -

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10.7 Cautions for A/D Converter
(1) Operating current in STOP mode
(2) Reducing current when A/D converter is stopped
328
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.
Be sure that the voltage to be applied to AV
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
current flows from the power supply that supplies a voltage to AV
shown in Figure 10-25, AV
satisfying the following conditions.
Set the following states before setting AV
Do not perform the following operation when AV
When restarting the A/D converter, operate it after the AV
(see 10.4.1 Basic operations of A/D converter for the procedure for setting the A/D converter operation).
Access digital ports after the AV
• Set ADCS and ADCE of the A/D converter mode register (ADM) to 0.
• Set the port mode registers (PM20 to PM27 ) of the digital I/O pins to 1 to set to input mode, or set the digital
• Make sure that no voltage is applied to all any of the analog or digital pins (P20/ANI0 to P27/ANI7 ) (set to 0
• Do not access the port registers (P20 to P27 ) or port mode registers (PM20 to PM27 ) by using instructions
I/O pins to low-level output (high-level output disabled) by setting the port mode registers (PM20 to PM27 )
and port registers (P20 to P27 ) to 0 to set to output mode.
V).
or via DMA transfer.
Figure 10-25. Example of Circuit Where Current Flows to External Circuit
Current flowing from power
supply supplying voltage to
AV
REF
REF
REF
= 0 V = AV
to external circuit
voltage has risen and stabilized.
CHAPTER 10 A/D CONVERTER
REF
User’s Manual U17854EJ9V0UD
REF
= 0 V.
SS
normally satisfies the conditions stated in Table 10-1.
REF
can be achieved and the external current can be reduced by
= 0 V.
REF
voltage rises and stabilizes and setting ADCE = 1
REF
REF
to an external circuit of the microcontroller as
AV
ANI0 to ANI7
, while the A/D converter is stopped. If a
REF