UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 142

• 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

6.2.3 Port 2
with port mode register 2 (PM2). An on-chip pull-up resistor of P20 to P25 pins can be used for them in 1-bit units
with pull-up resistor option register 2 (PU2).
140
Port 2 is a 6-bit I/O port with output latch. P20 to P25 pins can specify the input mode/output mode in 1-bit units
This port has also alternate functions as serial interface data I/O and clock I/O.
RESET input sets port 2 to input mode.
Figures 6-4 to 6-6 show block diagrams of port 2.
PU: Pull-up resistor option register
PM: Port mode register
RD: Port 2 read signal
WR: Port 2 write signal
WR
WR
WR
RD
PORT
PU
PM
(P20, P23, P25)
PU20, PU23,
PU25
PM20, PM23,
PM25
Output latch
Figure 6-4. Block Diagram of P20, P23, and P25
Alternate
function
CHAPTER 6 PORT FUNCTIONS
User’s Manual U14046EJ5V0UD
V
DD0
P-ch
P20/SI30,
P23/RxD0,
P25/ASCK0