Datasheet

CHAPTER 4 PORT FUNCTIONS
User’s Manual U18698EJ1V0UD
87
4.2.6 Port 11
Port 11 is a 2-bit I/O port with an output latch. Port 11 can be set to the input mode or output mode in 1-bit units
using port mode register 11 (PM11). When the P112, P113 pins are used as an input port, use of an on-chip pull-up
resistor can be specified in 1-bit units by pull-up resistor option register 11 (PU11).
This port can also be used for segment output and serial interface data I/O.
Reset signal generation sets port 11 to input mode.
Figures 4-9 and 4-10 show a block diagram of port 11.
Figure 4-9. Block Diagram of P112
P112/SEG6/TxD6
RD
WR
PORT
WR PM
Output latch
(P112)
PM112
PM11
WR PU
PU112
P-ch
PU11
Selector
Selector
Internal bus
P11
V
DD
Alternate
function
LCD controller/driver
WR PF
PF11ALL
PFALL
P11: Port register 11
PU11: Pull-up resistor option register 11
PM11: Port mode register 11
PFALL: Port function register ALL
RD: Read signal
WR××: Write signal