UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 183

• Manufacturer Part Number: UPD78F9234MC-5A4-A
• Description: MCU 8BIT 8KB FLASH 30PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9234MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 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: -

(8) Conversion results just after A/D conversion start
(9) A/D conversion result register (ADCR, ADCRH) read operation
(10) Operating current at conversion waiting mode
(11) Internal equivalent circuit
The first A/D conversion value immediately after A/D conversion starts may not fall within the rating range if the
ADCS bit is set to 1 within 1 s after the ADCE bit was set to 1, or if the ADCS bit is set to 1 with the ADCE bit =
0. Take measures such as polling the A/D conversion end interrupt request (INTAD) and removing the first
conversion result.
When a write operation is performed to the A/D converter mode register (ADM) and analog input channel
specification register (ADS), the contents of ADCR and ADCRH may become undefined. Read the conversion
result following conversion completion before writing to ADM and ADS. Using a timing other than the above may
cause an incorrect conversion result to be read.
The DC characteristic of the operating current during the STOP mode is not satisfied due to the conversion
waiting mode (only the comparator consumes power), when bit 7 (ADCS) and bit 0 (ADCE) of the A/D converter
mode register (ADM) are set to 0 and 1 respectively.
The equivalent circuit of the analog input block is shown below.
Remarks 1. The resistance and capacitance values shown in Table 10-3 are not guaranteed values.
Table 10-3. Resistance and Capacitance Values (Reference Values) of Equivalent Circuit
2. n = 0 to 3
3. R
R
C
C
OUT
IN
IN
OUT
4.5 V
2.7 V
: Analog input equivalent resistance
: Analog input equivalent capacitance
: Allowable signal source impedance
: Internal pin capacitance
AV
AV
AV
REF
REF
Figure 10-21. Internal Equivalent Circuit of ANIn Pin
REF
< 4.5 V
5.5 V
ANIn
CHAPTER 10 A/D CONVERTER
User’s Manual U17446EJ5V0UD
R
OUT
1 k
1 k
R
OUT
60 k
3 k
R
IN
LSI internal
C
OUT
R
IN
C
8 pF
8 pF
OUT
C
IN
15 pF
15 pF
C
IN
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