UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 147

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

4.2.8 Port 9 (78K0/DF2 only)
using port mode register 9 (PM9).
controller/driver outputs/inputs in
78F0849.
Port 9 is an 8-bit I/O port with an output latch. Port 9 can be set to the input mode or output mode in 1-bit units
This port can also be used for LCD segment outputs in
Reset signal generation sets port 9 to input mode.
Figures 4-24 and 4-25 shows block diagrams of port 9.
WR
WR
WR
RD
PORT
PM
PF
P9:
PM9:
LCDPFALL: LCD port function register ALL
RD:
WR
:
LCD controller/driver
Figure 4-21. Block Diagram of P90 to P92 and P94 to P96 (1/2)
PM90 to PM92,
PM94 to PM96
(P90 to P92,
Port register 9
Port mode register 9
Read signal
Write signal
Output latch
P94 to P96)
LCDPFALL
PF9ALL
PM9
P9
PD78F0840, 78F0841, 78F0842, 78F0843, 78F0846, 78F0847, 78F0848, and
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 4 PORT FUNCTIONS
(a)
PD78F0838 and 78F0839
PD78F0838 and 78F0839 or stepper motor
P90/SEG32 to
P92/SEG34,
P94/SEG36 to
P96/SEG38
145