UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 165

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

<R>
Note The time from the rising of the ADCE bit to the rising of the ADCS bit must be 1
Caution
Notes
internal circuit.
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 2 and 3 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 2
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
and 3 below are satisfied.
Example When AV
• AV
• AV
• AV
• AV
• AV
• AV
• AV
• AV
operation start to operation stabilization. Therefore, when ADCS is set to 1 after 1
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
first conversion data.
ADCE
ADCS
ADCE
REF
REF
REF
REF
REF
REF
REF
REF
0
1
×
≥ 4.5 V:
≥ 4.0 V:
≥ 2.85 V: 3.0
≥ 2.7 V:
≥ 4.5 V:
≥ 4.0 V:
≥ 2.85 V: 6.0
≥ 2.7 V:
Figure 10-4. Timing Chart When Comparator Is Used
• The sampling time is 11.0
• Set FR2, FR1, and FR0 = 0, 1, 1 or 1, 1, 1.
Note
more and 100
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
2.4
11.0
3.0
4.8
14.0
REF
CHAPTER 10 A/D CONVERTER
µ
µ
µ
µ
µ
µ
≥ 2.7 V, f
s or more
s or more
s or more
µ
s or more and less than 100
s or more and less than 100
s or more and less than 100
µ
Comparator operating
User’s Manual U16898EJ5V0UD
s or more
s or more and less than 100
µ
s or less.
Conversion
XP
waiting
= 8 MHz
A/D Conversion Operation
µ
s or more and the A/D conversion time is 14.0
Conversion
operation
µ
µ
µ
µ
s
s
s
s
Conversion stopped
µ
s or longer to stabilize the
µ
s or longer, ignore the
µ
s or more
µ
s from
µ
165
s or