UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 171

• 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: -

Caution
Notes
ADCS
1. The above sampling time and conversion time do not include the clock frequency error.
Comparator
0
0
1
Select the sampling time and conversion time such that Notes 3 and 4 above are satisfied,
while taking the clock frequency error into consideration (an error margin maximum of 5%
when using the high-speed internal oscillator).
2. Be sure to set the FR2, FR1, and FR0, in accordance with the reference voltage so that Notes 3
3. Set the sampling time as follows.
4. Set the A/D conversion time as follows.
5. Setting is prohibited because the values do not satisfy the condition of Notes 3 or 4.
6. The operation of the comparator is controlled by ADCS and ADCE, and it takes 1
Note The time from the rising of the ADCE bit to the rising of the ADCS bit must be 1 s or
ADCE
ADCS
and 4 below are satisfied.
Example When AV
operation start to operation stabilization. Therefore, when ADCS is set to 1 after 1 s or more
has elapsed from the time ADCE is set to 1, the conversion result at that time has priority over
the first conversion result. If the ADCS is set to 1 without waiting for 1 s or longer, ignore the
first conversion data.
AV
AV
AV
AV
AV
AV
AV
AV
ADCE
REF
REF
REF
REF
REF
REF
REF
REF
longer to stabilize the internal circuit.
0
1
Figure 10-4. Timing Chart When Comparator Is Used
Note
4.5 V:
4.0 V:
2.85 V: 3.0 s or more
2.7 V:
4.5 V:
4.0 V:
2.85 V: 6.0 s or more and less than 100 s
2.7 V:
The sampling time is 11.0 s or more and the A/D conversion time is 14.0 s or
more and 100 s or less.
Set FR2, FR1, and FR0 = 0, 1, 1 or 1, 1, 1.
Stop status (DC power consumption path does not exist)
Conversion waiting mode (only comparator consumes power)
Conversion mode
Table 10-2. Settings of ADCS and ADCE
Conversion
operation
1.0 s or more
2.4 s or more
11.0 s or more
3.0 s or more and less than 100 s
4.8 s or more and less than 100 s
14.0 s or more and less than 100 s
REF
CHAPTER 10 A/D CONVERTER
Comparator operating
User’s Manual U17446EJ5V0UD
2.7 V, f
Conversion
XP
waiting
= 8 MHz
A/D Conversion Operation
Conversion
operation
Conversion stopped
s from
169