UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 318

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

(2) 10-bit A/D conversion result register (ADCR)
318
Symbol
Note For details of wait period, see CHAPTER 35 CAUTIONS FOR WAIT.
ADCR
Cautions 1. When writing to the A/D converter mode register (ADM), analog input channel specification
This register is a 16-bit register that stores the A/D conversion result. The lower 6 bits are fixed to 0. Each time
A/D conversion ends, the conversion result is loaded from the successive approximation register. The higher 8
bits of the conversion result are stored in FF09H and the lower 2 bits are stored in the higher 2 bits of FF08H.
ADCR can be read by a 16-bit memory manipulation instruction.
Reset signal generation clears this register to 0000H.
Sampling
INTAD
ADCS
timing
Address: FF08H, FF09H
2. If data is read from ADCR, a wait cycle is generated. Do not read data from ADCR when the
ADCS
register (ADS), and A/D port configuration register (ADPC), the contents of ADCR may
become undefined.
writing to ADM, ADS, and ADPC. Using timing other than the above may cause an incorrect
conversion result to be read.
CPU is operating on the subsystem clock and the peripheral hardware clock is stopped. For
details, see CHAPTER 35 CAUTIONS FOR WAIT.
Figure 13-6. Format of 10-Bit A/D Conversion Result Register (ADCR)
←
Figure 13-5. A/D Converter Sampling and A/D Conversion Timing
period
1 or ADS rewrite
Wait
Note
FF09H
clear
SAR
After reset: 0000H
Read the conversion result following conversion completion before
CHAPTER 13 A/D CONVERTER
Sampling
User’s Manual U17260EJ6V0UD
Conversion time
R
Successive conversion
generation
to ADCR,
Transfer
INTAD
0
clear
SAR
0
FF08H
Conversion time
0
Sampling
0
0
0