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RL78/G1A CHAPTER 11 A/D CONVERTER
R01UH0305EJ0200 Rev.2.00 342
Jul 04, 2013
Figure 11-1. Block Diagram of A/D Converter
INTAD
ADCS ADMD FR2 FR1 ADCEFR0
Sample & hold circuit
Temperature sensor
AV
SS
A/D voltage comparator
A/D converter mode
register 0 (ADM0)
Internal bus
Internal bus
6
Analog input channel
specification register (ADS)
Controller
A/D conversion result
register (ADCR)
Conversion result
comparison upper limit
setting register (ADUL)
Conversion result
comparison lower limit
setting register (ADLL)
A/D conversion
result upper
limit/lower limit
comparator
Timer trigger signal (INTRTC)
Timer trigger signal (INTIT)
Comparison
voltage
generator
LV1 LV0
6
A/D port configuration
register (ADPC)
ADPC3 ADPC2 ADPC1 ADPC0
A/D test register
(ADTES)
ADTES1 ADTES0
4
2
ADS3ADS4 ADS2 ADS1 ADS0
ADISS
ADREFMADREFP0
ADRCK AWC ADTYP
ADREFP1
Internal reference voltage (1.45 V)
AV
DD
AV
REFP
/ANI0/P20
AV
REFM
/ANI1/P21
AV
SS
ADCS bit
ADREFP1 and ADREFP0 bits
ADTMD1 ADTMD0 ADTRS1 ADTRS0
A/D converter mode
register 1 (ADM1)
A/D converter mode
register 2 (ADM2)
Successive
approximation register
(SAR)
Internal reference voltage (1.45 V)
ADREFM bit
Selector
Selector
Selector
Selector
Selector
Timer trigger signal (INTTM01)
ADSCM
ANI16/P03/SI10/RxD1/SDA10
ANI17/P02/SO10/TxD1
ANI18/P10/SCK00/SCL00
ANI19/P120
ANI20/P10 to ANI24/P15
ANI25/P51/SO11/INTP2
ANI26/P50/SI11/SDA11/INTP1
ANI27/P30/SCK11/SCL11/INTP3/RTC1HZ
ANI28/P70/SCK21/SCL21/KR0
ANI29/P31/TI03/TO03/INTP4
ANI30/P41/TI07/TO07
ANI0/AV
REFP
/P20
ANI1/AV
REFM
/P21
ANI2/P22 to ANI7/P27
ANI8/P150 to ANI12/P154
Analog/digital
switcher
Remark Analog input pins in figure 11-1 when a 64-pin product is used.