R8C/20 Group, R8C/21 Group 7. Programmable I/O Ports
Rev.2.00 Aug 27, 2008 Page 43 of 458
REJ09B0250-0200
Figure 7.4 Configuration of Programmable I/O Ports (4)
P4_3 and P4_4
Port latchData bus
Pull-up selection
P4_2/VREF
Data bus
Direction
register
(1)
NOTE:
1. symbolizes a parasitic diode.
Ensure the input voltage on each port will not exceed VCC.
(1)
(1)
(1)