UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 154

• Manufacturer Part Number: UPD78F0034BGC-8BS-A
• Description: MCU 8-Bit 78K0 CISC 32KB Flash 2.5V/3.3V/5V 64-Pin LQFP
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0034BGC-8BS-A

• Package: 64LQFP
• Family Name: 78K0
• Maximum Speed: 12 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 51
• Interface Type: 3-Wire/UART
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

6.2.6 Port 4
bit units with port mode register 4 (PM4). An on-chip pull-up resistor of P40 to P47 pins can be used for them in 1-
bit units with pull-up resistor option register 4 (PU4).
152
Port 4 is an 8-bit I/O port with output latch. The P40 to P47 pins can specify the input mode/output mode in 1-
The interrupt request flag (KRIF) can be set to 1 by detecting falling edges.
This port can also be used as an address/data bus in external memory expansion mode.
RESET input sets port 4 to input mode.
Figures 6-16 and 6-17 show a block diagram of port 4 and block diagram of the falling edge detector, respectively.
Cautions 1. The internal pull-up resistor is not disconnected even if the external memory expansion mode
PU: Pull-up resistor option register
PM: Port mode register
RD: Port 4 read signal
WR: Port 4 write signal
WR
2. When using the falling edge detection interrupt (INTKR), be sure to set the memory expansion
WR
WR
RD
PORT
PM
is set when PU4n = 1 (n = 0 to 7).
mode register (MEM) to 01H.
PU
PM40 to PM47
PU40 to PU47
(P40 to P47)
Output latch
Alternate
function
Figure 6-16. Block Diagram of P40 to P47
CHAPTER 6 PORT FUNCTIONS
User’s Manual U14046EJ5V0UD
mode register (MEM)
Alternate
Memory expansion
Selector
function
Selector
V
DD0
P-ch
P40/AD0
P47/AD7
to