UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 57

• Manufacturer Part Number: UPD78F9234MC-5A4-A
• Description: MCU 8BIT 8KB FLASH 30PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9234MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

4.2.1
port mode register 0 (PM0). When the P00 to P03 pins are used as an input port, an on-chip pull-up resistor can be
connected in 1-bit units by using pull-up resistor option register 0 (PU0).
Port 0 is a 4-bit I/O port with an output latch. Each bit of this port can be set to the input or output mode by using
This port is also used as the analog input pins of the internal A/D converter.
Generation of reset signal sets port 0 to the input mode.
Figure 4-2 shows the block diagram of port 0.
Port 0
PU0:
P0:
PM0:
RD:
WR
WR
WR
WR
RD
: Write signal
PORT
PU
PM
Pull-up resistor option register 0
Port register 0
Port mode register 0
Read signal
PM00 to PM03
PU00 to PU03
(P00 to P03)
Output latch
PM0
PU0
P0
Figure 4-2. Block Diagram of P00 to P03
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17446EJ5V0UD
V
DD
P-ch
P00 to P03
55