UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 270

• Manufacturer Part Number: UPD78F0034BGC-8BS-A
• Description: MCU 8-Bit 78K0 CISC 32KB Flash 2.5V/3.3V/5V 64-Pin LQFP
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0034BGC-8BS-A

• Package: 64LQFP
• Family Name: 78K0
• Maximum Speed: 12 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 51
• Interface Type: 3-Wire/UART
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

(2) A/D conversion by software start
268
A/D conversion
When bit 6 (TRG0) and bit 7 (ADCS0) of A/D converter mode register 0 (ADM0) are set to 0 and 1, respectively,
A/D conversion of the voltage applied to the analog input pin specified by analog input channel specification
register 0 (ADS0) starts.
Upon the end of the A/D conversion, the conversion result is stored in A/D conversion result register 0 (ADCR0),
and the interrupt request signal (INTAD0) is generated. After one A/D conversion operation is started and ended,
the next conversion operation is immediately started. A/D conversion operations are repeated until new data
is written to ADS0.
If ADS0 is rewritten during A/D conversion, the converter suspends A/D conversion and A/D conversion of the
newly selected analog input channel is started.
If 1 is written to ADCS0 again during A/D conversion, the A/D conversion in progress is discontinued and a new
A/D conversion is started.
If 0 is written to ADCS0 during A/D conversion, the A/D conversion operation stops immediately.
Remarks 1. n = 0, 1, ......, 7
INTAD0
ADCR0
2. m = 0, 1, ......, 7
CHAPTER 13 8-BIT A/D CONVERTER ( PD780024A, 780024AY SUBSERIES)
ADM0 set
ADCS0 = 1, TRG0 = 0
Figure 13-7. A/D Conversion by Software Start
ANIn
User’s Manual U14046EJ5V0UD
ANIn
ANIn
Conversion suspended;
Conversion results are not stored
ANIn
ADS0 rewrite
ANIn
Undefined
ANIm
ANIm
ADCS0 = 0
ANIm
Stop