Datasheet

78K0/Kx2-L CHAPTER 4 PORT FUNCTIONS
R01UH0028EJ0400 Rev.4.00 144
Sep 27, 2010
Figure 4-12. Block Diagram of P21
(1) Products without operational amplifier
Internal bus
P21/ANI1
RD
WR
PORT
WR PM
Output latch
(P21)
PM21
Selector
PM2
A/D converter
P2
(2) Products with operational amplifier
Internal bus
P21/ANI1/AMP0OUT/PGAIN
RD
WR
PORT
WR PM
Output latch
(P21)
PM21
Selector
PM2
P2
A/D converter
PGA input
Operational amplifier output
WR AMP0M
OPAMP0E
AMP0M
P2: Port register 2
PM2: Port mode register 2
RD: Read signal
WR××: Write signal
Remark PGA: Programmable Gain Amplifier
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