Datasheet
78K0/Ix2 CHAPTER 4 PORT FUNCTIONS
R01UH0010EJ0500 Rev.5.00 112
Feb 28, 2012
Figure 4-5. Block Diagram of P21
(1) 78K0/IY2
PGA input
Note
RD
WR
PORT
WR
PM
PM21
PM2
P2
Internal bus
P21/ANI1/PGAIN
Note
Output latch
(P21)
Selector
A/D converter
(2) 78K0/IA2, 78K0/IB2
P21/ANI1/AMPOUT
Note
/PGAIN
Note
RD
WR
PORT
WR
PM
PM21
PM2
WR
AMP0M
OPAMP0E
AMP0M
P2
Internal bus
Output latch
(P21)
Selector
A/D converter
PGA input
Note
Operational
amplifier output
Note
P2: Port register 2
PM2: Port mode register 2
AMP0M: Operational amplifier 0 control register
RD: Read signal
WR: Write signal
Note Products with operational amplifier only
Remark PGA: Programmable Gain Amplifier