Port 6; Block Diagram Of P60 To P67 - NEC PD789488 User Manual

CHAPTER 4 PORT FUNCTIONS

4.2.6 Port 6

This is an 8-bit input-only port.
Note
This port is also used for the analog input of an A/D converter and key return signal input .
Figure 4-12 shows a block diagram of port 6.
µ
Note PD789489 and 78F9489 only.
Figure 4-12. Block Diagram of P60 to P67 (1/2)
µ
(a) When PD789488,78F9488 is used
RD
+ P60/ANI0 to P67/ANI7
A/D converter
−
V
REF
87
User's Manual U15331EJ4V1UD