Datasheet

78K0/Kx2-L CHAPTER 13 OPERATIONAL AMPLIFIERS
R01UH0028EJ0400 Rev.4.00 443
Sep 27, 2010
When using P20/ANI0/AMP0-, P21/ANI1/AMP0OUT/PGAIN, and P22/ANI2/AMP0+, set the registers according to the
pin function to be used (refer to Tables 13-4 and 13-5).
Table 13-4. Setting Functions of P20/ANI0/AMP0-, P22/ANI2/AMP0+ Pins
ADPC0 Register PM2 Register OPAMP0E bit
ADS Register
(n = 0, 2)
P20/ANI0/AMP0-,
P22/ANI2/AMP0+ Pins
Selects ANIn.
Analog input (to be converted into
digital signals)
0
Does not select ANIn.
Analog input (not to be converted
into digital signals)
Selects ANIn. Setting prohibited
Input mode
1
Does not select ANIn. Operational amplifier input
Analog input
selection
Output mode
− −
Setting prohibited
Selects ANIn. Setting prohibited Input mode
−
Does not select ANIn. Digital input
Selects ANIn. Setting prohibited
Digital I/O
selection
Output mode
−
Does not select ANIn. Digital output
Remark ADPC0: A/D port configuration register 0
PM2: Port mode register 2
OPAMP0E: Bit 7 of operational amplifier 0 control register (AMP0M)
ADS: Analog input channel specification register