UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 162

• 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

(5) Successive approximation register (SAR)
(6) 10-bit A/D conversion result register (ADCR)
(7) 8-bit A/D conversion result register (ADCRH)
(8) Controller
(9) AV
(10) V
(11) A/D converter mode register (ADM)
(12) Analog input channel specification register (ADS)
(13) Port mode control register 2 (PMC2)
162
This register compares the sampled analog voltage and the voltage of the D/A converter, and converts the result,
starting from the most significant bit (MSB).
When the voltage value is converted into a digital value down to the least significant bit (LSB) (end of A/D
conversion), the contents of the SAR register are transferred to the A/D conversion result register (ADCR).
The result of A/D conversion is loaded from the successive approximation register to this register each time A/D
conversion is completed, and the ADCR register holds the result of A/D conversion in its lower 10 bits (the higher
6 bits are fixed to 0).
The result of A/D conversion is loaded from the successive approximation register to this register each time A/D
conversion is completed, and the ADCRH register holds the result of A/D conversion in its higher 8 bits.
When A/D conversion has been completed, INTAD is generated.
This pin inputs an analog power/reference voltage to the A/D converter. When the A/D converter is not used,
connect this pin to V
The signal input to ANI0 to ANI3 is converted into a digital signal, based on the voltage applied across AV
V
This is the ground potential pin.
In the 78K0S/KA1+, V
V
This register is used to set the conversion time of the analog input signal to be converted, and to start or stop the
conversion operation.
This register is used to specify the port that inputs the analog voltage to be converted into a digital signal.
This register is used when the P20/ANI0 to P23/ANI3 pins are used as the analog input pins of the A/D converter.
SS
SS
SS
REF
.
pin
to a stabilized GND (= 0 V).
pin
DD
.
SS
functions alternately as the ground potential of the A/D converter. Be sure to connect
CHAPTER 10 A/D CONVERTER
User’s Manual U16898EJ5V0UD
REF
and